Qur’anic Root GH S Q
Ghasaq: the coming of night’s darkness, pouring and flowing, and ghassāq in descriptions of punishment
Qur’anic forms
1. Introduction and Qur’anic forms
The Arabic root GH S Q is associated with night becoming dark and darkness spreading. غَسَقَ اللَّيْلُ is said when night grows dark and daylight gives way to darkness. غَسَق denotes the darkness of night, while غَاسِق describes something that has become dark or is associated with darkness.
This family, however, is not confined to darkness. Early Arabic also records غَسَقَ for tears flowing, fluid emerging from a wound, rain pouring down, and milk streaming from an udder. The related word غَسَّاق occurs in Qur’anic descriptions of punishment. Early sources explain its precise meaning differently, ranging from foul, fetid liquid to extreme cold.
Consequently, not every form of this root can simply mean “darkness.” Nor does its use for liquids justify interpreting night’s darkening in every instance as something literally pouring down.
In the Qur’an, on the basis of the transmission of Ḥafṣ from ʿĀṣim, the root GH S Q occurs four times in four verses, in three forms:
- غَسَق: night’s darkness, or its coming and spreading; once, in Al-Isrāʾ 17:78.
- غَاسِق: the active participle of غَسَقَ; becoming dark, or something associated with darkness; once, in Al-Falaq 113:3.
- غَسَّاق: a nominal form with a doubled sīn; in two verses concerning punishment, Ṣād 38:57 and Al-Nabaʾ 78:25. Its precise meaning is disputed in the lexical tradition.
Other forms of this family are known in Arabic but do not occur in the Qur’anic text transmitted by Ḥafṣ. They include غَسَقَ, “became dark” or, in another use, “flowed”; أَغْسَقَ, “entered the darkness” or “became dark”; and غُسُوق and غَسَقان, verbal nouns associated with these uses. However, غَسَاق with an undoubled sīn must not be classified as non-Qur’anic: other canonical recitations have this reading at the same two passages, Ṣād 38:57 and Al-Nabaʾ 78:25. It is discussed in the section on recitational variation.
This distinction in form and meaning matters. Ghasaq in Al-Isrāʾ names the darkness of night; ghāsiq in Al-Falaq describes something becoming dark; ghassāq in Ṣād and Al-Nabaʾ denotes something mentioned in a context of punishment.
Although the four occurrences belong to one linguistic family, the precise meaning of each must be examined separately, with attention to the construction and context of its own verse.
2. Darkness and flowing in early Arabic
Ghasaq: the beginning of darkness or its deepening?
In Arabic, غَسَقَ اللَّيْلُ means that night became dark. However, the precise time denoted by ghasaq receives several explanations.
Some lexicographers understand it as the beginning of night’s darkness, when daylight fades and darkness spreads across the horizon.
Others associate it with the disappearance of twilight: the remaining light after sunset vanishes, and night’s darkness becomes more evident.
Another explanation relates ghasaq to the intensity and pervasiveness of night’s darkness.
These differences do not necessarily imply different roots. Night’s darkening is gradual: darkness can begin, spread, and deepen. In ordinary language, a word may denote the beginning or a more evident stage of the same event, depending on context.
This range does not mean that ghasaq denotes any arbitrarily chosen hour of the night.
In its established use, the central idea is the transition from daylight to night’s darkness and the emergence of that darkness.
“The coming of night’s darkness” therefore offers a suitable, relatively broad equivalent. “The intensity of night’s darkness” can also be justified in certain contexts, but identifying a precise temporal stage requires further evidence.
Evidence from Arabic poetry
A verse by ʿUbayd Allāh ibn Qays al-Ruqayyāt reads:
إِنَّ هَذَا اللَّيْلَ قَدْ غَسَقَا
وَاشْتَكَيْتُ الْهَمَّ وَالْأَرَقَا
“This night has indeed grown dark, and I have complained of sorrow and sleeplessness.”
Here غَسَقَا refers to night becoming dark.
The poet describes a situation in which night has come, and its darkness accompanies his sorrow and sleeplessness.
Sorrow and sleeplessness are not part of the meaning of the verb ghasaqa. They describe the poet’s personal condition alongside the darkness of night.
ʿUbayd Allāh ibn Qays al-Ruqayyāt was a poet of the Islamic period. This verse witnesses the word’s use in early Arabic, but it must not be presented as pre-Islamic poetry or certain evidence predating the Qur’an.
In Asās al-Balāghah, al-Zamakhsharī quotes a verse attributed to “Jassās.” This citation does not establish the poet’s full identity or the date of composition:
أَزُورُ إِذَا مَا أَغْسَقَ اللَّيْلُ خُلَّتِي
حِذَارَ الْعِدَى أَوْ أَنْ يُرَجِّمَ قَائِلُ
“When night grows dark, I visit my beloved, for fear of enemies or of someone speaking on the basis of conjecture.”
Here أَغْسَقَ اللَّيْلُ likewise expresses the coming of darkness.
In the poet’s situation, night’s darkness helps conceal the visit. Concealment or a secret visit, however, is not the lexical meaning of ghasaq itself.
These two witnesses show that using ghasaq for night’s darkening was familiar in Arabic poetry.
Ghasaq and the pouring of liquid
Another branch of this family concerns liquid flowing and coming out.
Arabic uses غَسَقَتِ الْعَيْنُ for an eye from which tears or fluid flow. Similarly, غَسَقَ الْجُرْحُ describes a wound from which yellowish fluid emerges.
In other uses, غَسَقَ اللَّبَنُ concerns milk streaming from an animal’s udder, and غَسَقَتِ السَّمَاءُ concerns rain falling or pouring down.
Some lexical explanations also record غَسَقان as pouring or streaming.
These uses show that the Arabic family GH S Q extends beyond the semantic field of darkness.
A poetic witness concerning flowing tears
An early lexicographer, Shamir, transmits the following verse:
أَبْكِي لِفَقْدِهِمْ بِعَيْنٍ ثَرَّةٍ
تَجْرِي مَسَارِبُهَا بِعَيْنٍ غَاسِقِ
“I weep for their loss with an eye abundant in tears; its channels stream with flowing tears.”
In this witness, غاسق means “flowing.”
This matters lexically because it shows that ghāsiq does not always mean “dark.”
Here the description concerns tears and their flowing.
However, the transmission examined does not clearly attribute the verse to a particular poet. It must therefore not be called pre-Islamic without independent evidence.
Did darkness develop from the meaning of flowing?
Some lexical explanations describe night’s darkening as darkness pouring or streaming down, as though it descends upon the earth and mountains and envelops them.
This image clearly resembles the use of ghasaq for flowing liquid.
The resemblance, however, does not prove that the meaning “darkness” historically developed from the flowing of liquids.
In Maqāyīs al-Lughah, Ibn Fāris identifies darkness as this root’s basic meaning. Other lexical explanations emphasize flowing and pouring.
This disagreement shows the difficulty of deriving every use from one certain historical core.
A more careful approach preserves both attested fields: becoming dark and flowing. Their imagery can be related, but the available evidence does not establish which meaning arose first.
Cold within the semantic field of ghasaq
Some Arabic sources also use غاسق for something cold.
One explanation is that night can be colder than day. Cold consequently appears in explanations of certain uses of this family.
This does not mean that every dark night is necessarily cold, or that ghasaq always means cold.
Nor does the existence of this meaning by itself prove that ghāsiq in Al-Falaq refers to lethal cold.
In the Qur’anic use, darkness and night’s arrival have more direct support. Cold is another branch or associated feature that becomes relevant only where the context supports it.
3. إِلَىٰ غَسَقِ اللَّيْلِ: night’s darkening as a time marker
Al-Isrāʾ 17:78
أَقِمِ الصَّلَاةَ لِدُلُوكِ الشَّمْسِ إِلَىٰ غَسَقِ اللَّيْلِ وَقُرْآنَ الْفَجْرِ ۖ إِنَّ قُرْآنَ الْفَجْرِ كَانَ مَشْهُودًا
“Establish ṣalāh from the sun’s decline (dulūk) until night grows dark, and the recitation of the Qur’an at dawn as well; the recitation at dawn is indeed witnessed.”
This is the only occurrence of the noun غَسَق in the Qur’an.
Here ghasaq is combined with اللَّيْل, so the passage concerns the darkness of night.
Ghasaq as an event marking time
The verse contains two temporal expressions: دُلُوكِ الشَّمْسِ and غَسَقِ اللَّيْلِ.
The sun’s dulūk concerns the sun’s position or movement. Its precise identification is debated in lexical and contextual interpretation, including its decline from the meridian or its setting. This interpretive disagreement should not be confused with variant recitations of the verse’s wording.
Night’s ghasaq likewise concerns night becoming dark.
The preposition إِلَىٰ between these expressions marks a limit or endpoint of the interval expressed in the sentence.
Ghasaq therefore functions here to identify a recognizable temporal condition.
The root GH S Q alone does not establish the number of ṣalāh observances, the details of performing them, or the legal names of worship times.
Those subjects require separate examination of ṣalāh, the sentence’s construction, the sun’s dulūk, qurʾān al-fajr, and other verses.
The present root study focuses on the meaning of ghasaq.
The onset of darkness or complete darkness?
Lexical sources offer two prominent explanations of night’s ghasaq: the onset of darkness, and its deepening or fuller development.
These possibilities must also be distinguished in this verse.
If ghasaq denotes the onset of darkness, إِلَىٰ غَسَقِ اللَّيْلِ marks an endpoint at night’s arrival and the first evident darkness.
If ghasaq denotes darkness deepening, the interval extends to a later stage of the night.
The word’s presence in this verse, however, does not specify a particular minute or hour.
Nor does it alone establish that midnight is intended. Such precision requires evidence beyond the word’s basic meaning.
“Until night grows dark” suits a general translation. If a separate study of ṣalāh times favors a more specific stage, that choice should be explained through contextual analysis and relevant evidence.
How ghasaq differs from night itself
Layl names the night, whereas ghasaq concerns darkness and its coming or deepening.
The concepts are close but not identical.
Night may begin while twilight remains, and darkness need not have the same intensity throughout the night.
Consequently, غسق الليل must not be translated simply as “night,” since that omits the feature of darkening expressed by ghasaq.
Conversely, ghasaq should not be taken to mean “the end of night.” In Arabic it is associated with darkness arriving and spreading, rather than with dawn breaking.
The relationship between ghasaq and fajr
In the same verse, night’s ghasaq is followed by mention of قُرْآنَ الْفَجْرِ, the recitation at dawn.
Fajr belongs to a different root and concerns daylight beginning to appear.
In this respect, ghasaq and fajr stand on either side of night’s darkness: one concerns darkness appearing and spreading, the other the emergence of light at the day’s beginning.
This relationship does not create a new meaning for ghasaq itself. The word does not mean the ending of the day or the beginning of dawn; its established meaning concerns night’s darkness.
The relationship between ṣalāh and qurʾān al-fajr also requires a separate study of the verse. The root GH S Q supplies only one component of its construction.
4. مِنْ شَرِّ غَاسِقٍ إِذَا وَقَبَ: harm as darkness arrives
Al-Falaq 113:3
وَمِنْ شَرِّ غَاسِقٍ إِذَا وَقَبَ
“And from the harm of approaching darkness when it envelops.”
This is the only Qur’anic occurrence of the active participle غَاسِق.
Ghāsiq is formed from غَسَقَ. In its use concerning night, it describes something that becomes dark or is associated with darkness.
In early lexical explanations, dark night is the most familiar referent of ghāsiq. Interpretations involving the moon and certain other celestial bodies are also recorded.
Ghāsiq as dark night
In the familiar interpretation, ghāsiq is night, particularly as its darkness arrives and spreads.
This meaning is directly related to غسق الليل in Al-Isrāʾ 17:78.
There ghasaq denotes night’s darkness; here ghāsiq refers to something characterized by becoming dark.
Accordingly, “from the harm of dark night when it arrives” and “from the harm of darkness when it envelops” are defensible translations.
The contributions of ghāsiq and waqaba must nevertheless be distinguished.
Ghāsiq describes something becoming dark or bringing darkness; entering and enveloping come from the verb وَقَبَ.
The meaning of إِذَا وَقَبَ
The verb وَقَبَ belongs to W Q B, a root associated in Arabic with entering and sinking into something.
In غاسق إذا وقب, the verb can refer to darkness entering and enveloping.
“When it envelops” therefore suits the construction as a whole.
Waqaba should not be understood as attacking or causing harm unless independent contextual evidence supports that conclusion.
Nor does ghasaq itself mean entering. Entering and enveloping belong to the contribution of the verb following ghāsiq.
Is darkness inherently evil?
The Qur’an says مِنْ شَرِّ غَاسِقٍ in this verse: “from the harm of ghāsiq.”
This is not equivalent to saying “ghāsiq is evil.”
The verse’s wording seeks refuge from the harm of something associated with darkness. Night’s darkness may accompany dangers and injuries, but that association does not establish that night itself is inherently bad in every circumstance.
Elsewhere, including Yūnus 10:67, the Qur’an presents night as a time for rest and counts it among the signs of creation.
Al-Falaq 113:3 therefore does not by itself establish night’s darkness, in opposition to daylight, as a permanent symbol of corruption and evil.
Dangers may arise at night, and certain harms may remain concealed. The verse, however, does not specify every kind of danger involved.
Animal attacks, harmful human conduct, or difficulty seeing in the dark can offer intelligible examples, but they must not be presented as the lexical meaning of ghāsiq itself.
The interpretation involving the moon
Some early explanations also identify ghāsiq with the moon.
This interpretation relates to the Arabic expression غَسَقَ الْقَمَرُ, which can describe the moon becoming dark, particularly during an eclipse when its light disappears.
A darkening moon can therefore fall within the lexical field of ghāsiq.
Al-Falaq 113:3 itself, however, does not name the moon.
Nor does إِذَا وَقَبَ alone establish that a lunar eclipse must be intended.
The lunar interpretation exists in early accounts and should be acknowledged. Its lexical possibility alone, however, does not establish its priority over the familiar meaning of dark night.
As an internal Qur’anic connection, غسق الليل in Al-Isrāʾ 17:78 provides clear support for the interpretation involving night and darkness.
Interpretations involving the Pleiades and other phenomena
Some early accounts also identify ghāsiq with the Pleiades, particularly when that star cluster sets.
This explanation is sometimes accompanied by ancient beliefs associating the time of the Pleiades’ setting with an increase in certain diseases.
Such beliefs do not in themselves determine the lexical meaning of ghāsiq.
The verse does not name the Pleiades or any particular disease.
This interpretation can therefore be recognized as an early identification of a referent, but it should not replace the clearer meaning of night’s darkness in the basic translation.
The connection with رَبِّ الْفَلَقِ
The surah begins with the command to seek refuge in رَبِّ الْفَلَقِ, “the Lord of daybreak”; Al-Falaq 113:1.
In this context, falaq has the familiar Arabic meaning of daybreak: the light whose appearance displaces night’s darkness.
There is consequently a clear correspondence between “the Lord of daybreak” and “the harm of ghāsiq when it envelops.”
The surah opens with the Lord of daybreak and then mentions the harm of approaching darkness.
This contrast does not mean that night is inherently evil or that morning is intrinsically equivalent to every good thing.
Nor should ghāsiq be translated as “defeated by falaq.” These are distinct roots, each with its own meaning.
In this verse, a person seeks refuge in The God, the Lord of daybreak, from the harm of darkness and the other dangers named in the surah.
5. Ghassāq: foul liquid or extreme cold?
The root’s two remaining occurrences are in Ṣād and Al-Nabaʾ.
Both verses place ghassāq alongside ḥamīm in a context concerning punishment in the hereafter.
Lexical sources and early explanations, however, do not agree on its precise meaning.
Ghassāq in Ṣād
Ṣād 38:57
هَٰذَا فَلْيَذُوقُوهُ حَمِيمٌ وَغَسَّاقٌ
“Here it is; let them taste it: intensely hot water and ghassāq.”
In this verse, حَمِيم concerns intensely hot water.
غَسَّاق appears alongside it, and both relate to the command فَلْيَذُوقُوهُ, “let them taste it.”
The verb “taste” indicates experiencing something in this scene of punishment. It does not alone establish ghassāq’s precise substance or qualities.
Early explanations fall into two main branches.
First interpretation: flowing liquid, purulent fluid, and foul discharges
This interpretation relates ghassāq to liquid that flows and emerges from a body or wound.
It connects with the attested expression غَسَقَ الْجُرْحُ, describing a wound from which fluid flows.
Lexical sources associate the ghassāq of the punishment passages with purulent, fetid liquid flowing from those undergoing punishment.
The interpretation has a defensible connection with the Arabic semantic branch concerning flowing.
Two levels must nevertheless be distinguished.
First, ghasaq is attested in Arabic for liquid flowing.
Second, certain early explanations identify the ghassāq of the hereafter with particular bodily discharges from those undergoing punishment.
The second level identifies a referent and explains the character of punishment. Its full detail cannot be extracted from the root alone.
Ṣād 38:57 itself does not specify which part of the body produces this liquid, its composition, or how it is collected.
“Foul, purulent liquid” is consequently a defensible translation on this interpretation, but more detailed claims require independent evidence.
Second interpretation: extreme cold
Early explanations also understand ghassāq as extreme cold.
On this interpretation, the term paired with ḥamīm denotes another kind of punishment involving painful cold.
The overall image can thus be understood as contrasting intensely hot water with extreme cold.
Their juxtaposition, however, does not alone establish that ghassāq must mean “frozen liquid” or “cold that burns the body like fire.”
The verse itself does not state these details.
Some lexical sources’ use of ghāsiq for cold supports examining this possibility, but does not by itself settle the meaning of ghassāq.
Can the two interpretations be combined?
One might propose that ghassāq is an extremely cold, fetid liquid and thus combine both explanations in a single image.
Some earlier explanations do make such a combination.
Combining two possibilities, however, is not itself evidence that both are correct.
It should remain clear that some sources emphasize flowing liquid and discharges, while others emphasize extreme cold.
Lexical research should preserve this actual disagreement and avoid constructing a certain picture whose details the Qur’an does not state.
The recitations غَسَّاق and غَسَاق
At Ṣād 38:57 and Al-Nabaʾ 78:25, Ḥamzah, al-Kisāʾī, Khalaf al-ʿĀshir, and Ḥafṣ from ʿĀṣim read غَسَّاق with a doubled sīn. The other readers among the ten canonical recitations read غَسَاق with an undoubled sīn at these same passages. These are actual recitational variants, rather than merely two morphological analyses of one reading.
The quoted verses and inventory in this article follow the transmission of Ḥafṣ from ʿĀṣim, with a doubled sīn in غَسَّاق. Recitational variation at these two passages adds no further occurrences to the root’s total of four.
Some lexicographers relate the doubled form to patterns expressing intensity or abundance, while treating the undoubled form more readily as an independent noun.
The doubled sīn alone, however, does not establish that ghassāq must denote more abundant liquid, greater cold, or a particular kind of punishment.
The variation is real, but determining precise meaning still requires linguistic usage and the verses’ contexts.
6. Ghassāq in Al-Nabaʾ and its relationship with ḥamīm
Al-Nabaʾ 78:25
إِلَّا حَمِيمًا وَغَسَّاقًا
“Except intensely hot water and ghassāq.”
This is the second Qur’anic occurrence of ghassāq.
The preceding verse matters for understanding it.
Al-Nabaʾ 78:24
لَا يَذُوقُونَ فِيهَا بَرْدًا وَلَا شَرَابًا
“There they taste neither coolness and relief nor any drink.”
The following verse, Al-Nabaʾ 78:25, names ḥamīm and ghassāq.
Ghassāq is thus set against relief and desirable drink here.
This context makes its unpleasant, punitive character clear, but does not alone resolve every lexical disagreement about its nature.
Ghassāq and drink
Because ghassāq follows the denial of desirable drink and stands alongside ḥamīm, the interpretation involving foul liquid fits this context clearly.
On this understanding, those undergoing punishment encounter intensely hot water and foul liquid in place of a wholesome drink.
This relationship does not mean that ghassāq denotes ordinary water.
Nor does ḥamīm being liquid establish that ghassāq must share all its characteristics.
The juxtaposition shows their contextual relationship, rather than necessarily an identity of substance and qualities.
Ghassāq and bard
The preceding verse contains بَرْدًا.
In Arabic, bard can concern coolness and relief. Some early explanations also propose a use close to sleep and repose.
If ghassāq is understood as extreme cold, soothing coolness must be distinguished from painful cold.
Consequently, the verse’s denial of coolness does not simply rule out every kind of punitive cold in that context.
Conversely, this possibility does not conclusively favor extreme cold over foul liquid.
The verse does not explicitly state the temperature of ghassāq.
The basic translation should therefore preferably retain ghassāq with a brief explanation, while the lexical article reports its two principal interpretations.
Is ghassāq a place name?
Some explanations of punishment associate ghassāq with a particular spring or location.
Ṣād 38:57 and Al-Nabaʾ 78:25 themselves, however, do not identify ghassāq as the name of a valley, a level of Hell, or a specified place.
Both verses place it alongside ḥamīm and relate it to tasting.
Identifying ghassāq conclusively as a particular place in the hereafter therefore goes beyond these verses’ direct meaning.
Its quantity, substance, temperature, or physical mode of action likewise must not be specified without independent evidence.
In matters of the hereafter, the Qur’an’s stated imagery should be preserved, while unstated details must not enter the translation as certain facts.
7. The relationship between darkness, flowing liquid, and ghassāq
After examining the four Qur’anic occurrences, an important question remains: did ghasaq, “darkness,” and ghassāq in the punishment passages develop from one original meaning?
A definitive answer is difficult.
Arabic sources attest both darkness and flowing within this family.
Explanations of night becoming dark sometimes speak of darkness pouring down, as though night descends upon the earth with its darkness and covers it.
Uses concerning liquids refer to actual flowing and pouring out.
A relationship between the imagery of these two fields is therefore conceivable.
Similarity of imagery, however, does not establish the history of derivation.
Maqāyīs al-Lughah identifies darkness as the family’s basic meaning. Lisān al-ʿArab and other sources also record its flowing-related uses in detail.
Neither meaning should therefore be treated as the other’s certain origin without adequate historical evidence.
The differing explanations of ghassāq as flowing liquid, foul odor, or extreme cold likewise show that its meaning has not been entirely uniform in lexical and exegetical traditions.
Even if ghassāq is morphologically related to ghasaq, that relationship alone does not determine which semantic feature is prominent in the punishment verses.
A more careful approach explains each branch through its own evidence:
In Al-Isrāʾ 17:78, ghasaq concerns night’s darkness.
In Al-Falaq 113:3, ghāsiq, on the better-supported interpretation, refers to night and the coming of darkness.
In Ṣād 38:57 and Al-Nabaʾ 78:25, ghassāq occurs in a context of punishment, and early explanations differ about its precise nature.
These differences should be preserved.
9. Translation proposals for Forqan
An equivalent for GH S Q should be chosen according to the word’s actual form and its context.
غَسَقِ اللَّيْلِ, Al-Isrāʾ 17:78
Suggested equivalents:
“Night becoming dark” or “the coming of night’s darkness.”
Within the sentence:
“Establish ṣalāh from the sun’s decline (dulūk) until night grows dark…”
This wording preserves ghasaq without fixing its temporal stage at a particular hour.
“The intensity of night’s darkness” is also lexically possible, but the basic translation need not specify that intensity without further explanation.
غَاسِقٍ إِذَا وَقَبَ, Al-Falaq 113:3
Suggested equivalent:
“Approaching darkness when it envelops.”
In the full verse:
“And from the harm of approaching darkness when it envelops.”
“From the harm of dark night when it arrives” is also natural and defensible.
Interpretations involving the moon or the Pleiades should be recorded in the lexical discussion, but should not displace the familiar meaning of dark night in the basic translation without sufficient evidence.
The sentence should also avoid presenting night itself as inherently evil and harmful, disregarding the qualification “harm” and the verse’s context.
غَسَّاق, Ṣād 38:57 and Al-Nabaʾ 78:25
This form’s meaning is less clear and less widely agreed upon than the preceding two uses.
Two proposals merit examination:
“Foul, purulent liquid,” based on the use of ghasaq for liquid flowing and early explanations involving foul discharges.
“Extreme, painful cold,” based on the lexical branch involving cold and explanations that contrast ghassāq with ḥamīm.
In a research translation, while the disagreement remains unresolved, ghassāq should preferably be retained with a brief explanation at its first occurrence.
For example:
“Here it is; let them taste it: intensely hot water and ghassāq.”
An explanation immediately after the translation can say: “Early accounts understand ghassāq as foul, purulent liquid or, in another interpretation, extreme cold.”
This method makes the disagreement between the two explanations visible in translation and avoids blending them into a single certain meaning. As noted above, however, combining coldness and foul odor in one liquid is not inherently impossible.
Ghassāq should likewise not be translated conclusively as “pus from the bodies of the inhabitants of Hell,” “frozen water,” “burning cold,” or “a spring at a particular location” unless independent evidence supports that restriction.
Brief meanings for word-by-word boxes
غَسَقِ, Al-Isrāʾ 17:78: night’s darkness; its arrival or deepening.
غَاسِقٍ, Al-Falaq 113:3: becoming dark; on this verse’s principal interpretation, dark night.
غَسَّاقٌ, Ṣād 38:57: ghassāq; something unpleasant in a context of punishment, whose precise nature is disputed.
غَسَّاقًا, Al-Nabaʾ 78:25: ghassāq; alongside intensely hot water, possibly denoting purulent liquid or extreme cold.
10. Conclusion
The Arabic root GH S Q is associated with night’s darkness. غسق الليل concerns darkness arriving or deepening, while ghāsiq, in its use concerning night, describes something that has become dark or is associated with darkness.
Alongside this branch, flowing-related uses are also attested: tears streaming, fluid emerging from a wound, milk flowing from an udder, and rain pouring down.
The spreading of darkness and the pouring of liquid can be related through imagery. The available evidence, however, does not establish their derivational history or which meaning came first.
The root occurs four times in the Qur’an.
In Al-Isrāʾ 17:78, غسق الليل identifies a temporal condition in connection with the command to establish ṣalāh. Its evident meaning concerns night becoming dark; the exact hour and a complete system of ṣalāh times cannot be derived from this root alone.
In Al-Falaq 113:3, غاسق إذا وقب, on the better-supported interpretation, refers to dark night and darkness enveloping. Early explanations also propose the moon and certain celestial bodies, but the verse does not explicitly name them.
Nor does this verse present night as inherently evil. It seeks refuge in The God from the harm associated with ghāsiq when it arrives.
In Ṣād 38:57 and Al-Nabaʾ 78:25, ghassāq occurs in a context of punishment. Its precise meaning is disputed. The interpretation involving foul, purulent liquid connects with flowing-related uses, while the interpretation involving extreme cold can be examined alongside certain uses involving cold. Neither should be presented without explanation as the word’s certain and exclusive meaning.
For Forqan, the basic definition of this family is: in its use concerning night, ghasaq is night becoming dark and darkness arriving or spreading. Another Arabic branch uses this family for liquids flowing and pouring. Ghāsiq describes something becoming dark or, in an appropriate context, flowing; ghassāq in the Qur’an names something punitive whose precise nature remains disputed in the lexical tradition.
This definition covers the four Qur’anic occurrences without equating night’s darkness with moral evil, imposing the flowing meaning on every verse, or placing unstated details of punishment in the hereafter within the root itself.