Qur’anic Root J Y B
The neckline and garment opening: from early Arabic usage to Qur’anic expression
Qur’anic and lexical forms
جُيُوبِهِنَّ
(juyūbihinna)
Plural with feminine pronoun; Al-Nūr 24:31
جَيْبِكَ
(jaybika)
Singular with second-person pronoun; Al-Naml 27:12 and Al-Qaṣaṣ 28:32
جَيْب
(jayb)
Neckline; a noun naming the garment opening
جُيُوب
(juyūb)
Plural of jayb; no unsuffixed Qur’anic occurrence
جَيَّبَ
(jayyaba)
Making a neckline; Form II verb; not Qur’anic
تَجْيِيب
(tajyīb)
Form II verbal noun; not Qur’anic
مُجَيَّب
(mujayyab)
Provided with an opening; passive participle; not Qur’anic
1. Introducing the root and its Qur’anic forms
The triliteral Arabic root J Y B concerns an opening or slit made in a garment. Its principal noun is «جَيْب» (jayb), which in early usage denotes the opening at the top of a shirt or garment: the opening through which the head passes, opposite the neck and upper chest. The natural Persian equivalent is garībān, “neckline” or “neck opening.”
This differs from the common meaning of Persian jīb today. A shirt or trouser pocket normally means a compartment holding money or small objects. Qur’anic jayb, however, is not that sewn storage compartment; it is the garment opening at the neck and upper chest.
The Qur’an uses this root three times, in two inflected forms:
- «جُيُوبِهِنَّ» (juyūbihinna) in Al-Nūr 24:31: the plural of jayb with a feminine plural pronoun, “their neckline openings.”
- «جَيْبِكَ» (jaybika) in Al-Naml 27:12: the singular with a second-person pronoun, “your neckline opening.”
- «جَيْبِكَ» (jaybika) in Al-Qaṣaṣ 28:32: the same singular form addressed to Moses.
In all three occurrences, the word is a noun referring to a garment opening. The Qur’an uses no verb from this root.
Quranic Arabic Corpus: three nominal occurrences
The two occurrences concerning Moses clarify the word’s physical meaning: he is commanded to put his hand into his garment opening. The third occurrence, in Al-Nūr, uses the same word in an instruction concerning women’s covering.
These three occurrences should be studied together. The meaning chosen for jayb in Al-Nūr should be compatible with its use concerning Moses.
2. The semantic core and early Arabic usage
An opening in a garment
In Maqāyīs al-Lughah, Ibn Fāris writes under this root:
فالْجَيْبُ جَيْبُ الْقَمِيصِ، يُقَالُ: جِبْتُ الْقَمِيصَ، قَوَّرْتُ جَيْبَهُ، وَجَيَّبْتُهُ، جَعَلْتُ لَهُ جَيْبًا.
fa-al-jaybu jaybu al-qamīṣi yuqālu jibtu al-qamīṣa qawwartu jaybahu wa-jayyabtuhu jaʿaltu lahu jayban
Translation: “Jayb is the neck opening of a shirt. One says: I cut out the shirt’s opening; and also: I provided the shirt with a neck opening.”
Ibn Fāris, Maqāyīs: the neckline and making an opening
Here jayb belongs to the garment’s construction. A completely closed piece of cloth needs an opening to be worn. In garments put on over the head, this opening is usually at the top.
Lisān al-ʿArab records the same meaning:
الْجَيْبُ جَيْبُ الْقَمِيصِ وَالدِّرْعِ، وَالْجَمْعُ جُيُوبٌ.
al-jaybu jaybu al-qamīṣi wa-al-dirʿi wa-al-jamʿu juyūb
Translation: “Jayb is the neck opening of a shirt or garment; its plural is juyūb.”
Ibn Manẓūr, Lisān: jayb and juyūb
Its use with qamīṣ and dirʿ shows that the name is not limited to a single garment design. The common feature is the opening at the neck.
Al-Fayyūmī gives a more precise definition of its location in Al-Miṣbāḥ al-Munīr:
جَيْبُ الْقَمِيصِ مَا يَنْفَتِحُ عَلَى النَّحْرِ.
jaybu al-qamīṣi mā yanfatiḥu ʿalā al-naḥr
Translation: “The jayb of a shirt is its opening at the throat and upper chest.”
Al-Fayyūmī, Miṣbāḥ: an opening at the upper chest
This definition shows that jayb is associated with the chest because of the garment opening’s location. The word primarily names a part of the garment opposite that area, rather than the chest or breast itself. Brief root meaning: The opening at the top of a garment, at the neck and upper chest; the neckline opening.
Distinguishing a garment opening from a body part
When one says jayb al-qamīṣ, the subject is the shirt’s neck opening, rather than the body of its wearer.
Since that opening lies opposite the neck and upper chest, some usages can refer through it to the corresponding bodily area. Such extension is natural, but the distinction between the opening and the body part should remain clear.
Persian “neck,” “chest,” “neckline,” and “shirt” are likewise related without being exact synonyms. The neck and chest belong to the body; the neckline belongs to the garment opposite them.
This distinction is essential to understanding Qur’anic jayb.
Making a neck opening
Arabic also records the verb «جَيَّبَ» (jayyaba):
جَيَّبْتُ الْقَمِيصَ تَجْيِيبًا.
jayyabtu al-qamīṣa tajyīban
That is: “I made a neck opening for the shirt.”
The action here concerns creating an opening. A garment maker leaves or cuts an opening for the head to pass through and the neck to occupy.
Tajyīb names this action, and «مُجَيَّب» (mujayyab) can describe something provided with such an opening or cut.
These forms occur in lexical sources, rather than the Qur’an. They clarify the relationship between jayb and garment construction.
3. Cutting and opening: the lexicographers’ disagreement about J Y B
One significant question concerns this root’s relationship with J W B.
Arabic jāba can refer to cutting, cleaving, or piercing something. Expressions concerning openings in earth and rock belong to the same semantic area.
Under J Y B, Ibn Fāris proposes that an interchange of weak letters may connect this family with J W B. After explaining jayb and jayyaba, he says:
وَهَذَا يَدُلُّ أَنَّ أَصْلَهُ وَاوٌ، وَهُوَ بِمَعْنَى خَرَقْتُ.
wa-hādhā yadullu anna aṣlahu wāwun wa-huwa bi-maʿnā kharaqtu
Translation: “This indicates that its original letter was wāw, and that it has the meaning ‘I pierced or made an opening.’”
Maqāyīs: the proposed wāw–yāʾ interchange
In this analysis, making a slit in cloth has an etymological relationship with cutting or opening.
This is not the only recorded analysis.
Lisān al-ʿArab transmits a view distinguishing jayb, whose middle radical is yāʾ, from jāba–yajūbu, whose middle radical is wāw. Semantic proximity alone does not merge the two roots; each retains its own lexical form and structure. Ibn Sīda’s Al-Muḥkam also gives this explanation, distinguishing «جُبْتُ» (jubtu), with ḍammah, from jāba–yajūbu, and «جِبْتُ» (jibtu), with kasrah, recorded for making a garment opening.
Ibn Sīda, Al-Muḥkam: distinguishing jibtu and jubtu
This disagreement matters. Two words can have similar meanings, and may even be historically related, without sufficient evidence to establish that one necessarily developed from the other.
For Qur’anic study, J Y B and J W B should therefore remain separate in morphological classification and occurrence counts.
J Y B has three nominal Qur’anic occurrences concerning neck openings. J W B has a wider family encompassing cutting and traversing, as well as answering.
Their possible relationship can illuminate the image of creating an opening. It does not make jayb mean cutting, cleaving, or passing through in these three verses: there it names an existing garment opening, rather than the act of cutting.
4. Early Arabic usages and extensions of meaning
The neckline as part of a garment
Lexicographers’ definitions of jayb al-qamīṣ and jayb al-dirʿ connect this word with the construction of clothing.
Qamīṣ denotes a garment covering the torso, while dirʿ also denotes a kind of clothing in some usages. Both can have an opening at the top through which the head passes when the garment is put on.
Jayb thus does not name a separate implement or independent piece of clothing. The opening belongs to the garment itself, although it may have an edge, border, or stitching around it.
Lexical accounts consequently sometimes explain jayb through cutting out and rounding an opening in the upper part of a garment.
These definitions do not reconstruct the exact clothing of pre-Islamic Arab women and men. The opening’s size, stitching, fabric, and extent could differ between garments.
Figurative use concerning the heart and chest
Arabic also records the expression «نَاصِحُ الْجَيْبِ» (nāṣiḥ al-jayb).
It describes someone pure within and sincere in intention. Lisān al-ʿArab explains that jayb here refers to the heart and chest, with trustworthiness and sincerity intended.
Al-Muḥkam and Lisān: nāṣiḥ al-jayb
Because the neckline lies over the chest, it can figuratively evoke a person’s inner life and what is in the heart.
This does not make jayb mean heart, intention, or secret in every occurrence. Sincerity arises from the expression nāṣiḥ al-jayb, rather than the noun alone.
An opening in the earth
Lexicons also record «جَيْبُ الْأَرْضِ» (jayb al-arḍ) for an entrance or opening in the earth.
Dhū al-Rummah says in a poem:
طَوَاهَا إِلَى حَيْزُومِهَا وَانْطَوَتْ لَهَا
جُيُوبُ الْفَيَافِي حَزْنُهَا وَرِمَالُهَا
ṭawāhā ilā ḥayzūmihā wa-inṭawat lahā / juyūbu al-fayāfī ḥaznuhā wa-rimāluhā
In Abū Naṣr al-Bāhilī’s commentary on Dhū al-Rummah’s Dīwān, juyūb al-fayāfī means the entrances to the desert expanses. The first half-line pictures a she-camel grown lean until her chest remains prominent; then the desert entrances, rough ground, and sands are traversed and seem folded up for her. The witness therefore does more than list depressions in the land: it also pictures the overcoming of distance.
Abū Naṣr al-Bāhilī’s commentary on Dhū al-Rummah: desert entrances and traversing distance
Dhū al-Rummah was an Umayyad poet, so this witness cannot be called pre-Islamic poetry. Its value lies in documenting a literary usage in early Arabic.
Here juyūb no longer denotes garment openings. The resemblance between openings in clothing and openings in the land supplies the desert image.
This extends the word’s attested range beyond clothing. It does not establish that jayb originally meant every cavity, cave, or hollow space.
The available evidence still presents the garment opening as a clear principal meaning.
Separating pre-Islamic witnesses from later lexical records
For J Y B, the word’s age should be distinguished from the dates of its written witnesses.
Its Qur’anic use shows that jayb was known in Arabic at the time of revelation. Lexicons also record its varied usages.
An example preserved in a dictionary compiled centuries later is not necessarily direct evidence from pre-Islamic poetry. Dhū al-Rummah’s poetry, despite its linguistic value, belongs to the period after revelation.
The Arabic background of this root can therefore be studied with confidence, while assigning any particular expression to the pre-Islamic period requires independent evidence for that witness’s attribution and date.
5. Qur’anic jayb in the account of Moses
Both singular occurrences of jaybika appear in the account of Moses. They are especially useful for identifying the noun’s meaning, because each describes a specific action involving the opening.
Al-Naml 27:12: putting the hand into the garment opening
وَأَدْخِلْ يَدَكَ فِي جَيْبِكَ تَخْرُجْ بَيْضَاءَ مِنْ غَيْرِ سُوءٍ فِي تِسْعِ آيَاتٍ إِلَىٰ فِرْعَوْنَ وَقَوْمِهِ إِنَّهُمْ كَانُوا قَوْمًا فَاسِقِينَ
wa-adkhil yadaka fī jaybika takhruj bayḍāʾa min ghayri sūʾin fī tisʿi āyātin ilā firʿawna wa-qawmihi innahum kānū qawman fāsiqīn
Translation: “And put your hand into your garment’s opening; it will come out white without harm, among nine signs to Pharaoh and his people. They were a defiantly disobedient people.”
Moses is commanded to put his hand into his jayb, after which the hand comes out white, without harm.
The sentence’s semantic structure is clear:
Adkhil commands insertion; yadaka identifies Moses’ hand; fī jaybika identifies where it is to be put; and takhruj describes its coming out.
Taking jayb as the opening at the top of the garment makes the sentence natural and intelligible. Moses puts his hand through the opening beneath his garment and then brings it out.
This fits the meaning recorded in Arabic lexicons.
Al-Ṭabarī: putting the hand into the garment opening
Reading jayb directly as the chest or the interior of the body would make the image unnatural: the apparent instruction does not concern inserting a hand into the body.
The Moses passages therefore provide strong evidence that jayb denotes the garment opening through which a hand can be put beneath the clothing.
The miracle concerns the hand’s changed appearance on emerging, rather than a change in the meaning of jayb.
Al-Qaṣaṣ 28:32: the same opening with a different verb
اسْلُكْ يَدَكَ فِي جَيْبِكَ تَخْرُجْ بَيْضَاءَ مِنْ غَيْرِ سُوءٍ وَاضْمُمْ إِلَيْكَ جَنَاحَكَ مِنَ الرَّهْبِ فَذَانِكَ بُرْهَانَانِ مِنْ رَبِّكَ إِلَىٰ فِرْعَوْنَ وَمَلَئِهِ إِنَّهُمْ كَانُوا قَوْمًا فَاسِقِينَ
usluk yadaka fī jaybika takhruj bayḍāʾa min ghayri sūʾin wa-uḍmum ilayka janāḥaka mina al-rahbi fa-dhānika burhānāni min rabbika ilā firʿawna wa-malaʾihi innahum kānū qawman fāsiqīn
Translation: “Put your hand into your garment’s opening; it will come out white without harm. And draw your wing close to yourself against fear. These are two proofs from your Lord to Pharaoh and his chiefs. They were a defiantly disobedient people.”
This verse describes the same event with the verb usluk.
Al-Naml uses adkhil, whereas this verse uses usluk. In these constructions, both describe putting the hand into the garment opening.
Arabic salaka can concern entering, inserting, following a way, or passing something through a route. Here its object is yadaka, and fī jaybika identifies the destination.
The different verbs provide no reason to change the meaning of jayb. In both verses the garment opening is where the action takes place.
These witnesses show that jayb can provide access for a hand beneath clothing. It cannot therefore be restricted to a small sewn compartment for storing objects.
Jayb and janāḥ in Al-Qaṣaṣ
Later in the Al-Qaṣaṣ verse, Moses is told:
“«وَاضْمُمْ إِلَيْكَ جَنَاحَكَ مِنَ الرَّهْبِ».”
Janāḥ primarily concerns a wing; in human usage it can refer to an arm or side. This part of the verse is closely connected with putting the hand into the garment opening, since both concern the movement and placement of bodily members.
Al-Ṭabarī: jayb and janāḥ as distinct expressions
Janāḥ and jayb nevertheless have different meanings. Jayb identifies the garment opening, while janāḥ here concerns a bodily member or its movement.
The Qur’an uses two distinct expressions, and translation should preserve their distinction.
What the two Moses passages establish
Comparing Al-Naml 27:12 and Al-Qaṣaṣ 28:32 establishes several points.
Jayb in both verses is an accessible part of a garment. A hand can enter through it and then emerge. It lies at the neck and upper chest and is familiar to the wearer.
The verses specify neither the precise design of Moses’ clothing nor the size of its opening. Nor do they say whether his garment had sleeves.
“Neck opening” supplies the meaning needed for both verses; historical details about the garment’s design need not be added.
6. Qur’anic juyūb in Al-Nūr
Al-Nūr 24:31: covering the neckline openings
وَقُلْ لِلْمُؤْمِنَاتِ يَغْضُضْنَ مِنْ أَبْصَارِهِنَّ وَيَحْفَظْنَ فُرُوجَهُنَّ وَلَا يُبْدِينَ زِينَتَهُنَّ إِلَّا مَا ظَهَرَ مِنْهَا وَلْيَضْرِبْنَ بِخُمُرِهِنَّ عَلَىٰ جُيُوبِهِنَّ وَلَا يُبْدِينَ زِينَتَهُنَّ إِلَّا لِبُعُولَتِهِنَّ أَوْ آبَائِهِنَّ أَوْ آبَاءِ بُعُولَتِهِنَّ أَوْ أَبْنَائِهِنَّ أَوْ أَبْنَاءِ بُعُولَتِهِنَّ أَوْ إِخْوَانِهِنَّ أَوْ بَنِي إِخْوَانِهِنَّ أَوْ بَنِي أَخَوَاتِهِنَّ أَوْ نِسَائِهِنَّ أَوْ مَا مَلَكَتْ أَيْمَانُهُنَّ أَوِ التَّابِعِينَ غَيْرِ أُولِي الْإِرْبَةِ مِنَ الرِّجَالِ أَوِ الطِّفْلِ الَّذِينَ لَمْ يَظْهَرُوا عَلَىٰ عَوْرَاتِ النِّسَاءِ وَلَا يَضْرِبْنَ بِأَرْجُلِهِنَّ لِيُعْلَمَ مَا يُخْفِينَ مِنْ زِينَتِهِنَّ وَتُوبُوا إِلَى اللَّهِ جَمِيعًا أَيُّهَ الْمُؤْمِنُونَ لَعَلَّكُمْ تُفْلِحُونَ
wa-qul li-al-muʾmināti yaghḍuḍna min abṣārihinna wa-yaḥfaẓna furūjahunna wa-lā yubdīna zīnatahunna illā mā ẓahara minhā wa-l-yaḍribna bi-khumurihinna ʿalā juyūbihinna wa-lā yubdīna zīnatahunna illā li-buʿūlatihinna aw ābāʾihinna aw ābāʾi buʿūlatihinna aw abnāʾihinna aw abnāʾi buʿūlatihinna aw ikhwānihinna aw banī ikhwānihinna aw banī akhawātihinna aw nisāʾihinna aw mā malakat aymānuhunna awi al-tābiʿīna ghayri ulī al-irbati mina al-rijāli awi al-ṭifli alladhīna lam yaẓharū ʿalā ʿawrāti al-nisāʾi wa-lā yaḍribna bi-arjulihinna li-yuʿlama mā yukhfīna min zīnatihinna wa-tūbū ilā Allāhi jamīʿan ayyuha al-muʾminūna laʿallakum tufliḥūn
Translation: “Tell the believing women to lower their gaze, guard their private parts, and not display their adornment except what is apparent of it. Let them draw their coverings over their neckline openings. Let them not display their adornment except to their husbands, their fathers, their husbands' fathers, their sons, their husbands' sons, their brothers, their brothers' sons, their sisters' sons, their women, those whom their right hands possess, male attendants without desire, or children who have not become aware of women's private parts. Let them not stamp their feet so that their hidden adornment becomes known. Turn to The God together, O believers, so that you may prosper.”
Juyūbihinna here is the plural of jayb, referring to the women’s garment openings.
The difference from the two Moses passages lies in the verb and sentence structure, rather than the noun itself.
Moses is commanded to put a hand into the opening; in Al-Nūr the instruction is to draw a covering over the openings.
Jayb thus has one basic meaning across the three verses, while the action involving it differs.
The roles of bi-khumurihinna and ʿalā juyūbihinna
The expression wa-l-yaḍribna bi-khumurihinna ʿalā juyūbihinna contains several semantic components.
Morphologically, wa-l-yaḍribna is an imperfect verb with the feminine plural nūn and the lām of command, expressing an instruction to women. Bi-khumurihinna identifies the instrument or thing used, while ʿalā juyūbihinna identifies where the covering is to be placed.
In this construction, ḍaraba with ʿalā concerns casting or placing something over something else. It does not mean striking the neckline.
The instruction therefore concerns using the coverings and placing them over the garment openings.
Khumur is the plural of khimār and belongs to KH M R. Covering and the kind of covering should be studied independently under that family. Classical Arabic records khimār as a covering a woman places on her head, which matters to the verse’s historical analysis.
Lexical sources under KH M R: khimār
In this phrase, however, the explicitly named location over which the covering is drawn is juyūb. Jayb should not be expanded to mean the entire head, hair, neck, and chest together.
Conversely, identifying juyūb as garment openings does not settle every question of dress requirements. That inquiry also requires independent study of khimār, zīnah, ibdāʾ, ḍarb, and the verse’s whole context.
Does juyūbihinna mean women’s breasts?
Some translations or interpretive explanations render juyūb as “chests” or “breasts.”
These equivalents should be assessed by distinguishing the direct meaning from the bodily area opposite the neckline.
Lexically, jayb is a garment opening at the throat and upper chest. An open neckline may expose part of the neck, upper chest, or adjacent bodily area.
Covering the opening can consequently also cover the body opposite it. That physical and contextual consequence does not change the noun’s primary meaning.
“Their neckline openings” is therefore the more precise equivalent for juyūbihinna. The bodily areas opposite those openings can be explained in the verse analysis.
A direct translation should not replace the garment opening with a body part and obscure the distinction.
The plural juyūbihinna
Al-Nūr uses the plural because the command addresses a group of women, and the pronoun hunna is feminine plural.
This plural alone does not establish that every woman had several garment openings. Arabic naturally uses plurals for body parts or things belonging to multiple people.
For example, telling a group to “wash your hands” does not mean that each individual has an unlimited number of hands. The subject matter and context establish the actual number.
Juyūbihinna likewise denotes the openings belonging to the women addressed.
The neckline, adornment, and its display
Al-Nūr speaks of not displaying adornment before and after juyūbihinna. This places the instruction about garment openings among commands concerning gaze, private parts, adornment, and social conduct.
The opening is therefore more than a technical detail of clothing in this verse: it is the location of an action commanded in the religious text.
The action’s value and purpose arise from the command’s context, rather than the meaning of jayb alone.
Jayb in the Moses passages also means the garment opening, without discussing women’s covering or adornment. This parallel warns against placing Al-Nūr’s entire moral and social significance inside the root itself.
Lexically, J Y B concerns clothing and its opening; covering, adornment, and the limits of bodily display emerge from its combination with the verse’s other words.
8. The translation problem: neckline or pocket?
In modern Persian, jīb usually means a compartment sewn into clothing. This familiar meaning can create a misleading image if used without explanation in Qur’anic translation.
In Al-Naml 27:12, translating the instruction as “put your hand into your pocket” may suggest a small shirt or trouser pocket to a contemporary reader.
Al-Qaṣaṣ 28:32 presents the same problem.
In Al-Nūr 24:31, “cast their coverings over their pockets” is more problematic still: a reader may see no clear connection between covering pockets and the verse’s instruction about women’s adornment and covering.
Persian garībān, by contrast, denotes the upper opening of a garment and conveys the image of all three verses more naturally.
It also fits the meaning recorded in early Arabic lexicons.
Would “collar” be a better equivalent?
Persian yaqah, “collar,” also concerns the upper garment around the neck. It can, however, denote the fabric or sewn band around the neck, whereas jayb more directly names the opening itself.
“Collar opening” is useful in a precise lexical explanation, but garībān is shorter and more natural in a running Persian translation of the Qur’an.
Does garībān convey the full meaning?
Persian garībān can also evoke the upper front of clothing, as in expressions for seizing or opening someone’s neckline.
That range makes it useful for Qur’anic translation, provided the root study explains that jayb denotes the opening at the neck and upper chest.
A longer explanation therefore need not be inserted into the verse translation. The study can clarify the precise meaning while the translation remains concise and natural.
9. Translation proposals for Forqan
For singular jayb, the principal proposed Persian equivalent is garībān; in English, “neckline opening” or “garment opening.”
Jaybika in Al-Naml 27:12 and Al-Qaṣaṣ 28:32 means “your garment opening.” In both verses, “put your hand into your garment opening” gives a clear image of the Arabic action.
For plural juyūbihinna in Al-Nūr 24:31, “their neckline openings” is appropriate.
The phrase wa-l-yaḍribna bi-khumurihinna ʿalā juyūbihinna may be rendered:
“Let them draw their coverings over their neckline openings.”
This distinguishes the covering, the action of drawing it over, and its location, without adding further interpretation to juyūb’s direct meaning.
A root explanation can use “the opening at the top of the garment,” “collar opening,” or “the opening through which the head passes.” “At the neck and upper chest” also clarifies its location, but need not replace the noun consistently in the base translation.
“Breast,” “the whole chest,” “heart,” “clothing compartment,” or “money pocket” should not replace jayb without contextual evidence.
10. Conclusion
Arabic J Y B concerns the garment opening. Its principal word, jayb, names the neckline opening at the neck and upper chest.
Lexicons record the word for shirts and other garments. Forms such as jayyaba and tajyīb concern making this opening. Disagreement over the historical relationship of J Y B and J W B should not merge their Qur’anic usages without justification.
Expressions such as nāṣiḥ al-jayb and jayb al-arḍ illustrate two kinds of extension. In the former, the neckline’s proximity to the chest evokes the heart and inner disposition; in the latter, the resemblance of a garment opening to an entrance in the land is prominent. These usages do not change jayb’s primary Qur’anic meaning.
In Al-Naml 27:12 and Al-Qaṣaṣ 28:32, Moses is commanded to put his hand into his garment opening. These passages establish the word’s physical meaning.
Al-Nūr 24:31 uses the same word in plural juyūbihinna. The command concerns drawing coverings over women’s neckline openings. Its relationship with adornment, bodily covering, and social conduct arises from the whole context, rather than a changed meaning of jayb.
For Forqan, garībān is therefore the appropriate principal Persian equivalent, with “neckline opening” in English. It retains its meaning across all three Qur’anic occurrences while allowing the sentence structure and context to distinguish Moses’ action from the instruction concerning women’s covering.