Mulḥaq bi-Rubāʿī: Definition, Two Groups and Nine Patterns

1. What it means to be annexed to a quadriliteral

A mulḥaq bi-rubāʿī form is an augmented triliteral assimilated to the morphological pattern of a quadriliteral. Mulḥaq denotes something made to follow another pattern; rubāʿī denotes a four-radical verb.
Assimilation does not transform the original triliteral root into a genuinely four-radical root. A formative addition creates a corresponding surface pattern.
For example, جَلْبَبَة exhibits a verbal-noun pattern associated with the quadriliteral family; counting written letters alone does not determine its morphological classification.

2. A true quadriliteral versus an assimilated triliteral

In an unaugmented quadriliteral, all four radical positions belong to the root: دَحْرَجَ has d–ḥ–r–j. In a mulḥaq form, a triliteral receives an extra formative element and comes to resemble an established quadriliteral pattern.
These are distinct morphological analyses even when the surface forms have similar lengths. A word with four pronounced consonants is not automatically a genuine four-radical root.
The root identifies the original radicals; the pattern describes the full morphological arrangement.

3. Why the verbal noun matters

The key condition for ilḥāq is not resemblance in a single finite form. The verbal-noun pattern must also correspond to the quadriliteral pattern to which the word is assimilated.
دَحْرَجَة is a familiar verbal noun of the unaugmented quadriliteral pattern. Assimilated verbal nouns are assessed in relation to that pattern family.
An extra consonant or a superficial similarity in the past-tense form alone does not establish ilḥāq.

4. Resemblance is not sufficient evidence

أَكْرَمَ — يُكْرِمُ — إِكْرَامًا belongs to Form IV (ifʿāl). It cannot be classed as an assimilated quadriliteral simply because its finite form contains additional letters: إِكْرَام and دَحْرَجَة are different verbal-noun patterns.
Recognising added letters and assigning a precise morphological category are two distinct steps. A single surface form does not resolve both.
That is why verbal-noun correspondence plays a decisive role in the source’s treatment of assimilation.

5. The two classes of assimilated patterns

The source divides the assimilated quadriliteral patterns into two groups:
1. Assimilated to the unaugmented quadriliteral — seven patterns.
2. Assimilated to the augmented quadriliteral — two patterns.
The section therefore contains nine patterns in total. Keeping these categories separate helps identify the verbal-noun template, the formative addition and the appropriate morphological class.

6. The first four of the seven unaugmented parallels

The first four verbal-noun-like templates listed under assimilation to the unaugmented quadriliteral are:

No.PatternExample
1فَعْلَلَةجَلْبَبَة: putting on a cloak.
2فَعْنَلَةقَلَنْسَة: putting on a cap.
3فَوْعَلَةجَوْرَبَة: putting on a sock.
4فَعْوَلَةسَرْوَلَة: putting on trousers or a lower garment.

The formative element does not occupy one fixed position: the patterns show consonant addition or wāw in different places. Related clothing meanings do not make the forms morphologically identical.

7. The remaining unaugmented parallels

The remaining three items in this seven-pattern list are:

No.PatternExample
5فَيْعَلَةحَيْعَلَة: putting on a sleeveless garment in this listed usage.
6فَعْيَلَةشَرْيَفَة: cutting overgrown leaves of crops.
7فَعْلَاةقَلْسَاة: putting on a cap.

These less familiar lexical examples require context. A word such as حَيْعَلَة may have other established usages, but the explanation here follows the meaning attached to this example in the source.

8. Comparing faʿlalah and faʿnalah

جَلْبَبَة and قَلَنْسَة both describe putting on clothing but follow different templates.
فَعْلَلَة has a doubled/repeated consonantal position in the quadriliteral-like construction; فَعْنَلَة includes a distinctive medial nūn.
جَلْبَبَة — putting on a cloak
قَلَنْسَة — putting on a cap
The meanings reveal the semantic field, but the morphological template determines the group. The final tāʾ marbūṭah belongs to the verbal-noun form.

9. Where the added wāw occurs

جَوْرَبَة follows فَوْعَلَة, whereas سَرْوَلَة follows فَعْوَلَة. Both contain wāw, but not in the same template position.
جَوْرَبَة — putting on a sock.
سَرْوَلَة — putting on a lower garment.
The locations of the fāʾ and ʿayn placeholders clarify where the extra element falls. The mere presence of wāw does not make these two patterns equivalent.

10. Patterns containing yāʾ

Two of the listed templates feature an added yāʾ: فَيْعَلَة and فَعْيَلَة. The yāʾ appears in a different position in each pattern, changing the full template.
حَيْعَلَة — in this source list, wearing a sleeveless garment.
شَرْيَفَة — cutting overgrown crop leaves.
The two forms cannot be treated as interchangeable. The location of yāʾ within the verbal-noun pattern is a grammatical distinction, not merely a spelling detail.

11. Similar meanings do not imply one pattern

Both قَلَنْسَة and قَلْسَاة are glossed as putting on a cap, yet they appear under distinct patterns:
قَلَنْسَة — فَعْنَلَة
قَلْسَاة — فَعْلَاة
Thus morphological classification cannot be determined by an English or Urdu translation alone. Near-synonyms may have different formations, and members of one pattern may differ in lexical meaning.

12. How the seven patterns differ structurally

The seven unaugmented parallels are differentiated by template structure:

Word / formMeaning / explanation
فَعْلَلَةجَلْبَبَة
فَعْنَلَةقَلَنْسَة
فَوْعَلَةجَوْرَبَة
فَعْوَلَةسَرْوَلَة
فَيْعَلَةحَيْعَلَة
فَعْيَلَةشَرْيَفَة
فَعْلَاةقَلْسَاة

This is a chart of verbal-noun patterns, not a 14-person perfect- or imperfect-tense conjugation.

13. The two augmented quadriliteral parallels

The second group consists of patterns assimilated to augmented quadriliterals. Two subgroups are listed:
1. Assimilated to تَدَحْرُج — seven verbal-noun patterns.
2. Assimilated to اِحْرِنْجَام — two verbal-noun patterns.
The first subgroup features initial tāʾ and different internal arrangements; the second involves a connecting hamza and distinctive medial structure.
These are labels of template correspondence, not evidence that the roots have become five- or six-radical roots.

14. Four patterns parallel to tadaḥruj

The first four patterns parallel to tadaḥruj are:

No.PatternExample
1تَفَعْلُلتَجَلْبُب: putting on a cloak.
2تَفَعْنُلتَقَلْنُس: putting on a cap.
3تَفَوْعُلتَجَوْرُب: putting on a sock.
4تَفَعْوُلتَسَرْوُل: putting on a lower garment.

All four verbal nouns begin with formative tāʾ, but their internal nūn, wāw and consonant positions distinguish their patterns. A common meaning does not make the verbal nouns structurally identical.

15. Three further parallels to tadaḥruj

The remaining three parallels to tadaḥruj are:

No.PatternExample
5تَفَيْعُلتَحَيْعُل: putting on a sleeveless garment.
6تَفَعْيُلتَشَرْيُف: cutting overgrown leaves of crops.
7تَفَعْلُلتَقَلْسُس: putting on a cap; the source also records the older underlying form تَقَلْسِي.

Yāʾ or a distinctive consonant arrangement affects each source form. In the seventh example, the source distinguishes an underlying older form from the listed shape; they refer to the same lexical illustration, not two unrelated examples.

16. Comparing jalbabah with tajalbub

جَلْبَبَة — a verbal noun in the first unaugmented-parallel pattern.
تَجَلْبُب — its related form in the first augmented-parallel subgroup.
Both concern putting on a cloak. The latter has an added initial tāʾ and a different internal vowel pattern.
Words with related meanings or derivational bases can therefore occupy distinct morphological classes. Comparing them reveals both their lexical relationship and their difference in formal pattern.

17. The cap-wearing pair

قَلَنْسَة — putting on a cap, in the second unaugmented-parallel pattern.
تَقَلْنُس — the related augmented form in the tadaḥruj subgroup.
The medial nūn remains visible, but taqalnus adds initial tāʾ and changes the verbal-noun ending.
Their templates are distinct: فَعْنَلَة versus تَفَعْنُل, even though the meaning and formative base are related.

18. The sock-wearing pair

جَوْرَبَة — putting on a sock, pattern فَوْعَلَة.
تَجَوْرُب — putting on a sock, pattern تَفَوْعُل.
The first verbal noun ends in tāʾ marbūṭah; the second adds initial tāʾ and has a different internal and final vowel scheme. Wāw remains visible in the lexical base.
The morphological pattern can therefore change even where one Urdu or English gloss adequately translates both forms.

19. The subgroup parallel to iḥrinjām

The second augmented-parallel subgroup is linked to the pattern of اِحْرِنْجَام. It lists two templates:
1. اِفْعِنْلَال — اِقْعِنْسَاس: becoming severely hunched.
2. اِفْعِنْلَاء — اِسْلِنْقَاء: lying flat on one’s back.
Both convey physical posture or condition, but they are distinct lexical meanings. Their beginnings, medial consonants and endings differ from the seven tāʾ-initial items in the first augmented subgroup.

20. Iqʿinsās and its meaning

The source glosses اِقْعِنْسَاس as becoming severely hunched. It denotes a posture or bodily condition.
The verbal noun is listed under the اِفْعِنْلَال subgroup. Its connecting-hamza opening and medial nūn distinguish it from the tāʾ-initial patterns corresponding to tadaḥruj.
This is the lexical meaning of the given example, not a claim that every verb of the same template means “becoming hunched.”

21. Islinqāʾ and its meaning

The source glosses اِسْلِنْقَاء as lying on one’s back. Like اِقْعِنْسَاس, it concerns bodily posture, but the described state is different.
The source places it as the second item under the second augmented-parallel subgroup. The final hamza, preceded by alif, is a recognisable part of its written form.
It should be learned as the specific verbal noun and meaning listed here, rather than treated as a regular unaugmented triliteral or a tāʾ-initial tafaʿlul noun.

22. Keeping verbal noun, root and meaning distinct

For these examples, the verbal noun names an action or state, the pattern represents its formal structure, and the meaning comes from the actual lexical usage.

Word / formMeaning / explanation
جَوْرَبَةputting on a sock; فَوْعَلَة.
تَجَوْرُبputting on a sock; تَفَوْعُل.
اِسْلِنْقَاءlying on one’s back; an item in the second augmented group.

The first two share a gloss but differ in template; the third differs in both lexical meaning and morphological subgroup.

23. The complete classification at a glance

Assimilated to unaugmented quadriliterals — 7 patterns
جَلْبَبَة، قَلَنْسَة، جَوْرَبَة، سَرْوَلَة، حَيْعَلَة، شَرْيَفَة، قَلْسَاة.
Assimilated to augmented quadriliterals — 2 subgroups
Tadaḥruj parallels: تَجَلْبُب، تَقَلْنُس، تَجَوْرُب، تَسَرْوُل، تَحَيْعُل، تَشَرْيُف، تَقَلْسُس.
Iḥrinjām parallels: اِقْعِنْسَاس، اِسْلِنْقَاء.
There are nine patterns or headings here; a heading may have several lexical examples. The count of chapters is not the count of all words appearing within the chapters.

24. Applying the classification

Word / formMeaning / explanation
سَرْوَلَةفَعْوَلَة without initial tāʾ; assimilated to an unaugmented quadriliteral.
تَسَرْوُلتَفَعْوُل with initial tāʾ; a first-subgroup augmented parallel.
اِسْلِنْقَاءneither of those templates; a second-subgroup augmented parallel.

The verbal-noun pattern and its formative elements are the primary evidence for classification. Its lexical meaning is then interpreted in context.

25. The principle that completes the first volume

In ilḥāq, a triliteral augmented form is associated with a quadriliteral template without becoming a genuine four-radical root. The correspondence must include the verbal noun, not just a casual resemblance of letters.
Seven patterns parallel unaugmented quadriliterals, and two categories parallel augmented quadriliterals, giving nine patterns. Some examples share meanings but differ in formation; others differ by a small formative element that signals a separate pattern.
The resulting morphological skill is to connect, but not confuse, the root, template, form, verbal noun and lexical meaning.