The Four Unaugmented and Augmented Quadriliteral Patterns

1. The four quadriliteral patterns

A quadriliteral verb has four original root consonants. This section contains four patterns:

No.PatternExample
1Unaugmented quadriliteralبَعْثَرَ, with four radicals and no extra formative letter.
2Augmented, with connecting hamzaاِبْرَنْشَقَ.
3Augmented, with connecting hamzaاِقْشَعَرَّ.
4Augmented, without connecting hamzaتَسَرْبَلَ.

The first preserves the root without augmentation. The remaining patterns employ an added consonant or doubling; their forms and meanings must therefore be distinguished.

2. Three versus four root consonants

ضَرَبَ has the root ḍ-r-b: three radicals, so it is triliteral.
بَعْثَرَ has b-ʿ-th-r: four radicals, so it is quadriliteral.
تَسَرْبَلَ contains five written consonants but does not have a five-radical root: the initial tāʾ is added, and its original radicals are s-r-b-l.
Counting visible letters is not enough. The morphological pattern identifies which consonants are radicals and which are formative additions.

3. The unaugmented quadriliteral template

The unaugmented quadriliteral follows فَعْلَلَ in the perfect and يُفَعْلِلُ in the imperfect. A common verbal noun is فَعْلَلَة.
بَعْثَرَ — يُبَعْثِرُ — بَعْثَرَةً
Translation: He scattered or turned over; he scatters or turns over; scattering or turning over.
The f–ʿ–l–l placeholders denote four positions. Bāʾ, ʿayn, thāʾ and rāʾ fill those positions as four original radicals; the two lām slots are distinct radical positions, not necessarily a repeated consonant.

4. Active short paradigm of baʿthara

Word / formMeaning / explanation
بَعْثَرَhe scattered; active perfect.
يُبَعْثِرُhe scatters; active imperfect.
بَعْثَرَةًscattering; verbal noun.
مُبَعْثِرٌsomeone who scatters; active participle.
بَعْثِرْscatter!; imperative.
لَا تُبَعْثِرْdo not scatter!; prohibition.

The imperfect uses initial yāʾ, while the second-person imperative does not. Prohibitive lā makes the imperfect jussive, leaving the final rāʾ vowelless.

5. Passive forms of baʿthara

Word / formMeaning / explanation
بُعْثِرَit was scattered; passive perfect.
يُبَعْثَرُit is scattered; passive imperfect.
مُبَعْثَرٌscattered or dispersed; passive participle.
مُبَعْثِرٌone who scatters; active participle.

The root b-ʿ-th-r remains unchanged. Vowels shift the focus from the agent to the recipient. In مُبَعْثِر, kasrah before the final radical marks the active participle; in مُبَعْثَر, fatḥah marks the passive participle.

6. Other quadriliteral verbal nouns

The common verbal-noun pattern for an unaugmented quadriliteral is فَعْلَلَة. Additional source examples include:

Word / formMeaning / explanation
دَحْرَجَةrolling something.
زَعْفَرَةcolouring with saffron.
عَسْكَرَةforming or assembling an army.

Their roots are d-ḥ-r-j, z-ʿ-f-r and ʿ-s-k-r respectively. All four radicals occupy the four verbal template positions. The final tāʾ marbūṭah is part of the verbal-noun pattern, not a fifth root consonant.

7. From basic to augmented quadriliterals

بَعْثَرَ has four radicals and no augmentation. اِبْرَنْشَقَ adds a connecting hamza and a nūn to the four radical slots. اِقْشَعَرَّ adds a connecting hamza and doubles the last radical. تَسَرْبَلَ adds an initial tāʾ.
An augmented quadriliteral does not have more than four original radicals. It preserves a four-radical root while adding specific pattern letters or gemination.

8. Two intransitive patterns with hamzat al-waṣl

The section presents two augmented quadriliteral patterns with hamzat al-waṣl, both classified as intransitive:
1. اِبْرَنْشَقَ — اِبْرِنْشَاق: becoming cheerful.
2. اِقْشَعَرَّ — اِقْشِعْرَار: hair standing on end, or shuddering.
An intransitive verb expresses an event or state complete in its subject and does not require a direct object. That is why the source’s short paradigms for these two examples do not supply regular passive forms.

9. First augmented pattern: ibranshaqa

اِبْرَنْشَقَ — يَبْرَنْشِقُ — اِبْرِنْشَاقًا
Translation: He became cheerful; he becomes cheerful; becoming cheerful.
The four original radicals are bāʾ, rāʾ, shīn and qāf. The form adds a connecting hamza initially and a formative nūn after rāʾ. The corresponding verbal noun has the characteristic ibrinshāq pattern.
An initial hamza alone does not make this a triliteral form: its four radicals and inserted nūn distinguish it.

10. Short paradigm of ibranshaqa

Word / formMeaning / explanation
اِبْرَنْشَقَhe became cheerful; perfect.
يَبْرَنْشِقُhe becomes cheerful; imperfect.
اِبْرِنْشَاقًاbecoming cheerful; verbal noun.
مُبْرَنْشِقٌone becoming cheerful; active participle.
اِبْرَنْشِقْbe cheerful!; imperative.
لَا تَبْرَنْشِقْdo not become cheerful!; prohibition.

The inserted nūn remains visible in the maṣdar and participle. The imperative begins with a connecting hamza, whereas prohibition uses the imperfect with lā al-nāhiyah.

11. How to recognise the inserted nūn

Word / formMeaning / explanation
b-r-sh-qthe four root radicals.
اِبْرَنْشَقَinitial hamza plus inserted nūn after rāʾ.
يَبْرَنْشِقُthe nūn is retained in the imperfect.
مُبْرَنْشِقٌthe nūn is also retained in the active participle.

Mistaking the inserted nūn for an original fifth radical would produce the wrong root and wrong template. The formative addition distinguishes this pattern from the unaugmented quadriliteral.

12. Other verbal nouns of the first augmented form

The first augmented pattern also appears in other verbal nouns, where connecting hamza and inserted nūn occur with a four-radical base:

Word / formMeaning / explanation
اِحْرِنْجَامgathering together.
اِغْرِنْكَاسhair becoming black.
اِبْرِنْشَاقbecoming cheerful.

The initial hamza and medial nūn are formative features, not additional root radicals. Each verb has its own lexical meaning while sharing the larger pattern.

13. Second augmented pattern: iqshaʿarra

اِقْشَعَرَّ — يَقْشَعِرُّ — اِقْشِعْرَارًا
Translation: His hair stood on end; his hair stands on end; hair standing on end.
The root has four radicals: qāf, shīn, ʿayn and rāʾ. The form begins with connecting hamza and ends in doubled rāʾ, repeating the fourth radical in the pattern.
This verb expresses a bodily reaction or change of state. The shaddah is a pattern feature, not evidence of a fifth distinct radical.

14. Gemination and the verbal noun iqshiʿrār

اِقْشَعَرَّ has a doubled final rāʾ. Its verbal noun اِقْشِعْرَار displays the root consonant sequence in a different vocalic and lengthened arrangement.
يَقْشَعِرُّ — his hair stands on end.
مُقْشَعِرٌّ — one experiencing the shudder; active participle.
The doubled final consonant remains visible in the imperfect and participle. Although this and the preceding pattern both begin with a connecting hamza, their internal structural changes differ.

15. Command and prohibition of iqshaʿarra

اِقْشَعَرَّ ends with a doubled rāʾ. The source therefore records forms with consonant assimilation and with the doubled consonants pronounced separately.
اِقْشَعِرَّ — اِقْشَعْرِرْ
Translation: let your hair stand on end; two imperative pattern forms.
لَا تَقْشَعِرَّ — لَا تَقْشَعْرِرْ
Translation: do not let your hair stand on end; prohibitive pattern forms.
The first type keeps the consonant assimilation; the second separates the repeated rāʾ. Since the event is normally involuntary, these commands are uncommon in ordinary use, but the morphological alternation is meaningful.

16. Why the two patterns are treated as intransitive

With اِبْرَنْشَقَ, the subject becomes cheerful. With اِقْشَعَرَّ, the subject experiences a bodily reaction. Neither example needs a direct object to complete its meaning; this is the central feature of an intransitive verb.
By contrast, in بَعْثَرَ الرَّجُلُ الْوَرَقَ, the paper receives the action of scattering. In that usage, بَعْثَرَ is transitive. Transitivity is established by the verb’s actual relation to its object, not by the mere number of radical letters.

17. The pattern without connecting hamza

The augmented quadriliteral without connecting hamza starts with an added tāʾ:
تَسَرْبَلَ — يَتَسَرْبَلُ — تَسَرْبُلًا
Translation: He put on a garment; he puts on a garment; putting on a garment.
Its four radicals are sīn, rāʾ, bāʾ and lām. The initial tāʾ is formative. The perfect follows تَفَعْلَلَ, and the verbal noun follows تَفَعْلُل.

18. Short paradigm of tasarbala

Word / formMeaning / explanation
تَسَرْبَلَhe put on a garment; perfect.
يَتَسَرْبَلُhe puts on a garment; imperfect.
تَسَرْبُلًاputting on a garment; verbal noun.
مُتَسَرْبِلٌsomeone wearing a garment; active participle.
تَسَرْبَلْput on a garment!; imperative.
لَا تَتَسَرْبَلْdo not put on a garment!; prohibition.

The two tāʾs at the beginning of the prohibitive verb have different jobs: one marks the second-person imperfect and the other belongs to the augmented pattern.

19. Other maṣdars of tafaʿlul

The source also includes تَبَخْتُر and تَبَرْقُع within this pattern:
تَبَخْتَرَ — تَبَخْتُرًا — walking with a proud sway.
تَبَرْقَعَ — تَبَرْقُعًا — putting on a face veil or covering.
Their roots are b-kh-t-r and b-r-q-ʿ. The initial tāʾ is formative, while the remaining four letters are the root consonants. Their verbal nouns follow تَفَعْلُل like تَسَرْبُل.

20. Why the imperatives start differently

Word / formMeaning / explanation
بَعْثِرْimperative of the unaugmented quadriliteral, without an added initial hamza or tāʾ.
اِبْرَنْشِقْimperative of an augmented quadriliteral with hamzat al-waṣl.
تَسَرْبَلْimperative of an augmented quadriliteral without connecting hamza.

The initial consonant of an imperative depends on its morphological form. In تَسَرْبَلْ, tāʾ is part of the template; in اِبْرَنْشِقْ, the connecting hamza provides a pronounceable onset.

21. Prohibition is based on the imperfect

Prohibition uses the second-person imperfect in the jussive after lā al-nāhiyah:

Word / formMeaning / explanation
تُبَعْثِرُ ← لَا تُبَعْثِرْdo not scatter.
تَبْرَنْشِقُ ← لَا تَبْرَنْشِقْdo not become cheerful.
تَتَسَرْبَلُ ← لَا تَتَسَرْبَلْdo not put on a garment.

Each example keeps its morphological pattern. The final imperfect ḍammah becomes sukūn under jussive government. Adding lā directly to the perfect is not how the prohibitive form is built.

22. Comparing the active participles

Word / formMeaning / explanation
مُبَعْثِرٌfrom بَعْثَرَ: one who scatters.
مُبْرَنْشِقٌfrom اِبْرَنْشَقَ: one becoming cheerful.
مُقْشَعِرٌّfrom اِقْشَعَرَّ: one whose hair stands on end.
مُتَسَرْبِلٌfrom تَسَرْبَلَ: one wearing a garment.

All four active participles begin with mīm bearing ḍammah; that alone does not identify the form. The inserted nūn, doubled final consonant and extra initial tāʾ reveal the distinct templates.

23. Root-and-augmentation comparison

Word / formMeaning / explanation
بَعْثَرَroot b-ʿ-th-r; no addition.
اِبْرَنْشَقَroot b-r-sh-q; added hamza and nūn.
اِقْشَعَرَّroot q-sh-ʿ-r; added hamza and doubling of final rāʾ.
تَسَرْبَلَroot s-r-b-l; added initial tāʾ.

The distinctions remain visible across imperfects, verbal nouns and active participles. A reliable identification uses the four root radicals alongside each pattern’s distinctive augmentation.

24. Verb forms versus verbal nouns

Word / formMeaning / explanation
بَعْثَرَperfect verb: he scattered.
بَعْثَرَةverbal noun: scattering.
اِقْشَعَرَّperfect: hair stood on end.
اِقْشِعْرَارverbal noun: the state of hair standing on end.
تَسَرْبَلَperfect: he put on a garment.
تَسَرْبُلverbal noun: putting on a garment.

A verbal noun preserves the basic action or state without identifying a subject and tense as a finite perfect or imperfect does.

25. A unified account of all four forms

Four connected features identify a quadriliteral pattern: root, augmentation, verb paradigm and verbal noun.
بَعْثَرَ/بَعْثَرَة has four radicals without augmentation.
اِبْرَنْشَقَ/اِبْرِنْشَاق adds hamza and nūn.
اِقْشَعَرَّ/اِقْشِعْرَار adds hamza and doubles the final radical.
تَسَرْبَلَ/تَسَرْبُل adds initial tāʾ.
Transitivity must also be respected: baʿthara commonly acts on an object, while the other source examples describe a state or event experienced by their subject.