Qur'anic Root Q S W

1. Introduction to the Root

The root “Q S W” in Arabic indicates hardness, solidity, and resistance to penetration or effect. “قَسَا الشَّيْءُ” means that something became hard and inflexible, and “شَيْءٌ قَاسٍ” is something that does not easily soften, split, or change.

The Arabs before Islam used this root to describe material things and difficult conditions. “حَجَرٌ قَاسٍ” is a hard stone, “أَرْضٌ قَاسِيَةٌ” is hard and barren land, “عَامٌ قَسِيٌّ” is a difficult and rainless year, and “دِرْهَمٌ قَسِيٌّ” was a poor-quality or impure coin. In old poetry as well, “العام القسي” occurs for a year of famine, and “القسيات” for hard and poor-quality coins. The attribution of some of these verses to a specific poet is not certain; but the lexical usages themselves show the oldness of this semantic field. By contrast, a pre-Islamic poetic witness with certain attribution for the metaphor “hardness of heart” is more limited.

In human usage, this root is attributed to a heart that has lost softness, receptivity, and readiness to respond. The Qur'an transfers this known material image into the field of the heart: a hard heart is a heart in which a sign, reminder, covenant, warning, or experience does not easily make an effect.

The major meanings of this root may be recognized as follows:

• a body becoming hard and solid;
• land becoming dry and resistant to penetration;
• a time, path, or situation becoming severe and difficult;
• struggling with a difficult matter;
• the heart becoming hard and its receptivity decreasing;
• roughness, impurity, or poor quality in some usages related to coin and metal.

The Qur'anic usage of this root relates only to the heart. Even so, “hardness of heart” in the Qur'an is not limited to emotional cruelty; rather, the heart’s resistance to what should penetrate it and produce a fitting response is at the center of the meaning.

2. Morphological Note About the Final Letter of the Root

The basic verb of this root is conjugated as follows:

قَسَا يَقْسُو قَسْوَةً

The present form “يَقْسُو” shows that the final root-letter is wāw. This verb belongs to the weak-final wāw verbs.

In some derivatives, the wāw changes to yāʾ because of morphological rules, or falls at the end of the word:

• قَسَا: became hard;
• يَقْسُو: becomes hard;
• قَاسٍ: hard;
• قَاسِيَة: hard, in the feminine form;
• قَسْوَة: hardness;
• قَسَاوَة: hardness and solidity.

Therefore, the form “قَاسِيَة” belongs to the root “Q S W” despite its outward yāʾ form.

3. Material Image and Semantic Core

The most tangible image of this root is a stone into which ordinary pressure does not penetrate and which does not easily change shape:

حَجَرٌ قَاسٍ

In this image, three features appear:

1. hardness of structure;

2. resistance to penetration or change;

3. not responding to ordinary pressures.

Another image is hard, dry land in which nothing grows:

أَرْضٌ قَاسِيَةٌ

Such land may receive seed, but it is not ready for water to penetrate, for plants to grow, and for life to be nurtured. The problem is not only that seed or water has not arrived; the structure of the land has become such that what reaches it does not easily enter it.

When this image is transferred to the heart, qaswah is not merely “cruelty.” A hard heart may hear speech, see a sign, or experience an event, but these things do not penetrate its evaluation and orientation.

On this basis, the semantic core of “Q S W” may be stated as follows:

Becoming hard and resistant in such a way that receptivity, flexibility, or responsiveness decreases.

In bodies, this state appears as solidity. In land, as dryness and inability to receive water and nurture plants. In time and situation, as difficulty and severity. In the heart, as reduced receptivity before reminder, proof, covenant, and experience.

4. Early Arabic Usages

4.1. Hard Stone

“حَجَرٌ قَاسٍ” was used for a hard and resistant stone. This usage preserves the root’s main material image, and the Qur'an itself compares hardened hearts with stones.

4.2. Hard and Barren Land

“أَرْضٌ قَاسِيَةٌ” is land that has become hard and in which nothing grows. In this usage, hardness is not merely strength; it is a hardness that decreases the capacity to receive and nurture.

4.3. A Difficult and Rainless Year

In a rajaz cited by early lexical sources without certain attribution, it is said:

وَيُطْعِمُونَ الشَّحْمَ فِي الْعَامِ الْقَسِي
قُدُمًا إِذَا مَا احْمَرَّ آفَاقُ السَّمِي

“الْعَامِ الْقَسِي” is a difficult, rainless year in which securing food has become hard. Since the speaker and exact date of this rajaz are not certain, it may be treated as a witness to old language, not as pre-Islamic poetry with a firmly established attribution.

4.4. Hard Night and Day

Forms of this root are also reported for a cold or very dark night and for a difficult day of battle or distress:

• لَيْلَةٌ قَاسِيَةٌ: a hard, cold, or dark night;
• يَوْمٌ قَسِيٌّ: a hard and difficult day.

In this usage, physical hardness has been transferred to the severity of conditions.

4.5. Poor-Quality Coin

In some early usages, “دِرْهَمٌ قَسِيٌّ” was used for a coin that was poor-quality, impure, or excessively hard. The softness and purity of metal were connected with its quality, and unusual hardness could indicate that it was mixed with something else.

In a verse most often attributed to Abū Zubayd al-Ṭāʾī, though its attribution is not uniform in all sources, it is said:

لَهَا صَوَاهِلُ فِي صُمِّ السِّلَامِ كَمَا
صَاحَ الْقَسِيَّاتُ فِي أَيْدِي الصَّيَارِيفِ

The sound of iron tools on hard stone is compared with the sound of the “قَسِيَّات” coins in the hands of money-changers. The value of this verse lies more in recording an old lexical usage than in proving a certain attribution to a particular poet.

4.6. Enduring Hardship

“قَاسَى الأَمْرَ” means he struggled with a difficult matter, endured its hardship, or exerted effort to pass through it. Its verbal noun is “مُقَاسَاة”.

In this structure, the person faces something hard and spends effort to endure it or overcome it. This form does not appear in the Qur'an.

5. Important Derivatives

Among the most important forms of this family are:

• قَسَا يَقْسُو: became hard or lost receptivity.
• قَسْوَة: hardness, solidity, and decreased receptivity.
• قَسَاوَة: another verbal-noun form, meaning hardness.
• قَاسٍ: hard, solid, or inflexible.
• قَاسِيَة: feminine form of qāsī.
• أَقْسَى: harder; and in verbal structure, made hard.
• قَاسَى: faced difficulty and endured it.
• مُقَاسَاة: enduring and struggling with a difficult matter.
• تَقَسَّى: became hard or made oneself hard.
• دِرْهَمٌ قَسِيٌّ: a hard, impure, or poor-quality coin.

In the Qur'an, only the simple verb “قَسَا”, the verbal noun “قَسْوَة”, and the adjective “قَاسِيَة” appear.

6. Qur'anic Forms

The root “Q S W” appears in the Qur'an in the following forms:

• قَسَتْ: became hard;
• قَسْوَةً: hardness;
• قَاسِيَةً: hard;
• الْقَاسِيَةِ قُلُوبُهُمْ: those whose hearts are hard.

All Qur'anic uses of this root are directly connected with the heart. In the Qur'an, stone, land, night, or coin are not described with this root; rather, the known image of material hardness is used to explain an inner state.

Even so, the Qur'anic usage is not separated from the material image. In the verse of Al-Baqarah, the text itself compares hearts with stone and makes the ground of semantic transfer visible.

7. “قَسَتْ قُلُوبُكُمْ” and the Comparison with Stone

ثُمَّ قَسَتْ قُلُوبُكُمْ مِنْ بَعْدِ ذَٰلِكَ فَهِيَ كَالْحِجَارَةِ أَوْ أَشَدُّ قَسْوَةً

Al-Baqarah 2:74

This verse gives the clearest Qur'anic image of the root.

7.1. Hardness as a Change

“قَسَتْ” is a past-tense verb and indicates that a state occurred: the hearts became hard.

The phrase “مِنْ بَعْدِ ذَٰلِكَ” also shows that this hardness appeared after earlier events and signs. The verse does not present the hearts as hard and unchangeable by original nature; it speaks of a change that occurred in them.

7.2. The Structure “قَسَتْ قُلُوبُكُمْ”

In “قَسَتْ قُلُوبُكُمْ”, the verb appears as feminine singular. “قُلُوب” is a broken plural of a non-rational noun, and in such a structure it is accompanied by a feminine singular verb.

Thus the tāʾ in “قَسَتْ” does not point to the addressees; it is the feminine marker of the verb in agreement with “قُلُوب”.

7.3. Comparison with Stone

The phrase “فَهِيَ كَالْحِجَارَةِ” compares the hardness of the hearts with the hardness of stones. The point of comparison is not the color, shape, or material of stone; it is its resistance to penetration and change.

But the continuation of the verse prevents stone from being treated as an absolute symbol of non-response:

وَإِنَّ مِنَ الْحِجَارَةِ لَمَا يَتَفَجَّرُ مِنْهُ الْأَنْهَارُ وَإِنَّ مِنْهَا لَمَا يَشَّقَّقُ فَيَخْرُجُ مِنْهُ الْمَاءُ وَإِنَّ مِنْهَا لَمَا يَهْبِطُ مِنْ خَشْيَةِ اللَّهِ

From some stones rivers burst forth, some split so water comes out of them, and some fall down out of khashyah of The God.

Al-Baqarah 2:74

Therefore, even stones in the text of the verse are not presented as identical and absolutely unresponsive. The expression “أَوْ أَشَدُّ قَسْوَةً” shows that the human heart can become harder than stone in refusing to receive effect.

From this verse itself one can grasp the relation between qaswah and remaining closed before effect. But turning water into a fixed symbol of revelation goes beyond the lexical meaning of the root and is not necessary for defining “Q S W”.

7.4. The Structure “أَشَدُّ قَسْوَةً”

“قَسْوَةً” in this phrase is a tamyīz and explains in what respect the greater intensity exists:

harder in respect of qaswah.

Thus “قَسْوَة” here is not the name of one particular behavior; it expresses the degree of hardness and resistance to effect.

8. Hardness and Distress Remaining Ineffective

فَلَوْلَا إِذْ جَاءَهُمْ بَأْسُنَا تَضَرَّعُوا وَلَٰكِنْ قَسَتْ قُلُوبُهُمْ وَزَيَّنَ لَهُمُ الشَّيْطَانُ مَا كَانُوا يَعْمَلُونَ

Al-Anam 6:43

In this verse, the arrival of distress should have prepared the ground for pleading and reconsideration; but the result was different:

• distress came;
• pleading did not occur;
• hearts became hard;
• earlier deeds appeared adorned to them.

Qaswah in this context means that even the experience of pressure and harm did not penetrate their evaluation and orientation. They were not merely deprived of emotional feeling; they continued to see their earlier conduct as correct or beautiful.

The pairing of hardness with deeds appearing adorned shows that a hard heart may resist reviewing its behavior. What should create questioning becomes confirmation of the same previous path.

9. Covenant-Breaking and the Hard Heart

فَبِمَا نَقْضِهِمْ مِيثَاقَهُمْ لَعَنَّاهُمْ وَجَعَلْنَا قُلُوبَهُمْ قَاسِيَةً يُحَرِّفُونَ الْكَلِمَ عَنْ مَوَاضِعِهِ وَنَسُوا حَظًّا مِمَّا ذُكِّرُوا بِهِ

Al-Maidah 5:13

In this verse, several matters are placed in one semantic chain:

• breaking the covenant;
• hearts becoming hard;
• moving words away from their places;
• forgetting a portion of what they had been reminded of.

Qaswah here is not only harshness toward others. A hard heart also loses flexibility and trustworthiness in relation to covenant and speech. Such a heart may receive words, but not keep them in their proper places; or it may hear reminder, but abandon a portion of it.

In this verse, instead of “قَسَتْ قُلُوبُهُمْ”, the structure “جَعَلْنَا قُلُوبَهُمْ قَاسِيَةً” appears. “جَعَلْنَا” places the hearts in the described state, and the sentence states this condition in clear connection with their breaking of the covenant. Therefore, the text does not present hardness here as a result disconnected from their previous behavior.

Even so, defining how this making occurs, or naming it as a specific kind of ontological punishment, goes beyond the limits of root study. What can be said clearly from the structure of the verse is the relation between covenant-breaking and the heart being placed in a state of hardness.

The form “قَاسِيَةً” describes the resulting state of the hearts. Unlike “قَسَتْ”, which highlights the occurrence of hardness, “قَاسِيَة” focuses on the quality that has come into being.

10. Lengthening of Time and the Hardening of the Heart

أَلَمْ يَأْنِ لِلَّذِينَ آمَنُوا أَنْ تَخْشَعَ قُلُوبُهُمْ لِذِكْرِ اللَّهِ وَمَا نَزَلَ مِنَ الْحَقِّ وَلَا يَكُونُوا كَالَّذِينَ أُوتُوا الْكِتَابَ مِنْ قَبْلُ فَطَالَ عَلَيْهِمُ الْأَمَدُ فَقَسَتْ قُلُوبُهُمْ

Al-Hadid 57:16

This verse presents hardness as a state that can appear across the extension of time.

The semantic structure of the verse is as follows:

• the time has come for hearts to have khushuʿ;
• the remembrance of The God and what has come down of the truth provide the ground for this khushuʿ;
• the period became long upon the earlier group;
• then their hearts became hard.

The phrase “فَطَالَ عَلَيْهِمُ الْأَمَدُ” connects hardness with the lengthening of time. Linguistically, the verse speaks of a state formed across a duration of time, not necessarily of a sudden change.

This warning is addressed to those who have faith. Therefore, hardness in Qur'anic usage is not the fixed name of one people or group; it is a human possibility that can appear when khushuʿ and responsiveness are lost.

11. Hardness and Disease of the Heart

لِيَجْعَلَ مَا يُلْقِي الشَّيْطَانُ فِتْنَةً لِلَّذِينَ فِي قُلُوبِهِمْ مَرَضٌ وَالْقَاسِيَةِ قُلُوبُهُمْ

Al-Hajj 22:53

In this verse, two states are placed beside one another:

• those in whose hearts there is disease;
• those whose hearts are hard.

The pairing of these two expressions shows that “disease of the heart” and “hardness of the heart” should not be treated as the same meaning without evidence.

Disease indicates disorder, damage, or an unhealthy state; hardness indicates hardness and decreased receptivity. These two states may have close consequences, but their linguistic images are different.

In the structure “الْقَاسِيَةِ قُلُوبُهُمْ”, “الْقَاسِيَةِ” is formally an active participle, but in this usage it describes a stable state and functions like a fixed adjective. “قُلُوبُهُمْ” is also its syntactic dependent. The meaning of the structure is:

those whose hearts are hard.

This way of speaking attributes hardness to the heart, not to all features of the persons’ existence.

12. Hardness in Contrast with Opening and Softness

أَفَمَنْ شَرَحَ اللَّهُ صَدْرَهُ لِلْإِسْلَامِ فَهُوَ عَلَىٰ نُورٍ مِنْ رَبِّهِ فَوَيْلٌ لِلْقَاسِيَةِ قُلُوبُهُمْ مِنْ ذِكْرِ اللَّهِ

Az-Zumar 39:22

In this verse, the opening of the chest and being upon light stand opposite the hardness of the heart. “Sharh of the chest” is the image of spaciousness and readiness to receive; “hardness of heart” is the image of reduced receptivity.

The phrase “مِنْ ذِكْرِ اللَّهِ” may describe hearts that remain hard before, at the arrival of, or in relation to the remembrance of The God. The point is not that the remembrance of The God inherently hardens the heart; rather, in these people, even the arrival of reminder is not accompanied by softness and receptivity.

The next verse in the same surah expresses the opposite direction with the root “L Y N”:

ثُمَّ تَلِينُ جُلُودُهُمْ وَقُلُوبُهُمْ إِلَىٰ ذِكْرِ اللَّهِ

Az-Zumar 39:23

By placing these two verses beside one another, a clear semantic contrast emerges:

• the hard heart remains hard and low in response in relation to reminder;
• the soft heart softens toward reminder.

This contrast shows that Qur'anic hardness is not merely rough behavior toward others; it also expresses the heart’s relation to reminder.

13. Semantic Boundaries of Hardness of Heart

13.1. Hardness Is Not Only Cruelty

In Persian and English, “hardness” or “hard-heartedness” often evokes cruel behavior toward others. But the Qur'anic uses of “Q S W” are broader.

A hard heart may:

• not be affected by reminder;
• not reconsider before a sign;
• fail to keep covenant in conduct;
• move words away from their places;
• forget a portion of the reminder;
• lose its khushuʿ through the lengthening of time;
• experience hardship but not weigh its own path.

Cruelty may be one consequence of hardness, but it is not its complete definition.

13.2. Hardness Does Not Mean Having No Feeling

A person may have attachment, fear, anger, or other emotions, yet show no flexibility before proof and reminder. Hardness of heart does not indicate the extinguishing of all emotions; it expresses the quality of the heart’s response to what should make an effect in it.

13.3. Hardness Is Not Necessarily Unchangeable

The verb “قَسَتْ” shows that a heart can become hard. Its contrast with “تَلِينُ قُلُوبُهُمْ” also shows that softness of heart is another possible state.

Therefore, from the root itself one cannot conclude that every hard heart remains hard forever and without possibility of change. The verses describe the state, path, and consequence of it.

13.4. Hardness Is Not Identical with Strength

Being hard is not always being strong. A hard heart may appear resistant, but this resistance can block receiving and reconsidering.

Strength can exist with awareness and flexibility; hardness focuses on decreased receptivity.

13.5. Hardness Is Not Identical with Ignorance

A person may possess information, yet that information may not affect his orientation. In Al-Maidah 5:13, hardness is paired with distortion and forgetting a portion of the reminder, not with the total absence of speech and awareness.

Therefore, hardness can appear even in the presence of data and reminder.

14. Difference from Nearby Roots

14.1. Q S W (qasā) and Ṣ L B (ṣaluba)

“صَلُبَ” focuses more on structural firmness and bodily hardness. Something solid may be firm and resistant without this quality being viewed negatively.

“قَسَا”, in addition to hardness, focuses on reduced penetrability and responsiveness. In Qur'anic usage, this feature is applied to the heart and appears in a negative context.

14.2. Q S W (qasā) and Sh D D (shadda)

“Sh D D” indicates intensity, force, firmness, or increase of degree, and can be positive or negative.

“Q S W” expresses a particular kind of intensity: a hardness that reduces acceptance and receptivity.

14.3. Q S W (qasā) and Gh L Ẓ (ghaluẓa)

“غَلُظَ” in its root sense indicates thickness, coarseness, and roughness, and can appear in speech, behavior, or bodily structure.

“قَسَا” in Qur'anic usage more specifically expresses the state of the heart in relation to sign, covenant, reminder, and change. A person may be coarse in speech, but that alone does not establish the whole meaning of hardness of heart.

14.4. Q S W (qasā) and F Ẓ Ẓ (faẓẓa)

“فَظّ” is close to roughness and unpleasantness of behavior or speech, and describes more the outward manner of dealing with others.

“Hardness” expresses the quality of the heart’s receptivity. Harsh behavior may arise from a hard heart, but the two are not lexically identical.

14.5. Q S W (qasā) and Y B S (yabisa)

“يَبِسَ” indicates becoming dry and losing moisture. Dryness may be one image accompanying hardness, especially regarding land.

But qaswah is broader than dryness and also indicates solidity and resistance to effect.

14.6. Q S W (qasā) and M R Ḍ (mariḍa)

Disease of the heart pictures disorder or an unhealthy state. Hardness of the heart pictures hardness and decreased responsiveness.

The Qur'an places these two expressions beside one another in Al-Hajj 22:53, thereby distinguishing between them.

14.7. Q S W (qasā) and L Y N (lāna)

“لَانَ” is the closest material and semantic contrast with “قَسَا”:

• qāsī: hard and low in receptivity;
• layyin: soft and receptive.

In Az-Zumar, both states are examined in relation to the remembrance of The God.

14.8. Q S W (qasā) and Kh Sh ʿ (khashaʿa)

“خَشَعَ” indicates lowering, quieting, and entering a state of attention and receptivity.

In Al-Hadid 57:16, the khushuʿ of the heart stands opposite its hardness. Softness focuses on the capacity to be affected; khushuʿ on the kind of response of the heart; and hardness reduces the ground of both.

14.9. Q S W (qasā) and R Y N (rāna)

In Al-Mutaffifin it is said:

كَلَّا بَلْ رَانَ عَلَىٰ قُلُوبِهِمْ مَا كَانُوا يَكْسِبُونَ

Al-Mutaffifin 83:14

“رَانَ عَلَىٰ” indicates something covering, overwhelming, or becoming dominant over the heart. The image of rayn is the image of something settling over the heart and covering it.

“Hardness” has a different image: the heart itself has become hard in terms of receptivity. Therefore:

• “rayn” focuses on a covering or dominance over the heart;
• “qaswah” focuses on the hardness and decreased responsiveness of the heart.

This difference should not become the claim that one is always superficial and the other always essential and unchangeable. Both images describe the state of the heart from different angles.

15. Semantic Development

In Arabic before Islam, “Q S W” had a field wider than moral cruelty. Stone, land, year, night, path, difficult situation, and coin could be described with forms of this root.

The Qur'an chose from this material field the image of hardness of heart. In Qur'anic usage, the issue is not merely emotional roughness; the heart develops resistance before what should penetrate it and make it attentive, humble, or ready to reconsider.

In today’s Persian and English usage, “hard-heartedness” is often equated with cruelty, violence, and harming others. This meaning is not outside the root’s field, but it does not fully cover its Qur'anic use.

For precise understanding of the verses, the following elements must also be preserved:

• impenetrability;
• decreased receptivity;
• resistance to reminder;
• sign and experience remaining ineffective;
• loss of khushuʿ;
• and continuing on a path without reconsideration.

16. Care in Translation

Translating “قَسَتْ قُلُوبُهُمْ” as “their hearts became stone” conveys the image, but it may make the meaning only emotional.

More precise translations according to context may include:

• their hearts became hard;
• their hearts became resistant to effect;
• their hearts lost receptivity;
• their hearts became hard before reminder.

For “قُلُوبُهُمْ قَاسِيَةٌ” one may say:

• their hearts are hard;
• they have hard and low-receptivity hearts;
• their hearts have hardened before reminder.

“أَشَدُّ قَسْوَةً” may be translated as:

more intense in hardness

Or, according to the context:

harder than stone in resistance to effect.

“Hard-hearted” may be smooth in some contexts, but it usually evokes cruelty toward others. Therefore it should not be used for all Qur'anic uses of this root without examining the context.

17. Conclusion

The root “Q S W” indicates hardness, solidity, and resistance to effect. Its basic image is seen in hard stone and dry land: something into which pressure, water, or seed does not easily penetrate.

In Arabic before Islam, this root was used for hard stone, barren land, difficult year, cold night, hard situation, endurance of hardship, and some poor-quality coins. The Qur'an transfers this material field to the heart.

Hardness of heart in the Qur'an is not only cruelty; it is a state in which a sign, reminder, covenant, speech, experience, or hardship does not produce a fitting response in the heart. Such a heart may hear speech but move it from its place, receive reminder but forget a portion of it, experience hardship but not reconsider, or lose its khushuʿ through the passage of time.

The Qur'anic contrasts clarify the boundary of this meaning:

• hardness in contrast with softness;
• hardness in contrast with khushuʿ;
• a hard heart in contrast with an opened chest;
• resistance to reminder in contrast with softening toward it.

The compressed meaning of the root may be stated as follows:

قَسَا”: became hard and resistant, in such a way that the capacity for being affected, flexibility, and responsiveness decreased.