Ism al-Tafḍīl: Meaning, Eight Forms, Patterns and Use

1. Meaning of ism al-tafḍīl

An ism al-tafḍīl is a derived noun/adjective indicating that a quality occurs to a greater degree. It often compares two or more people or things: one may be larger, smaller, or more knowledgeable than another.

Word / formMeaning / explanation
أَكْبَرُgreater or bigger.
أَصْغَرُsmaller.
أَعْلَمُmore knowledgeable.

A plain label such as “big” or “knowledgeable” misses the comparative or superlative force carried by the morphological form.

2. Quality and relative degree

An ordinary adjective names a quality, whereas ism al-tafḍīl indicates a greater degree of that quality.

Word / formMeaning / explanation
كَبِيرٌbig, with no comparison necessarily expressed.
أَكْبَرُbigger or greater.
صَغِيرٌsmall.
أَصْغَرُsmaller.

In context the same morphological class can express a superlative (“greatest/smallest”). Translation therefore depends on whether a particular comparison or the highest degree is intended.

3. Eight forms in the source paradigm

The book's paradigm presents eight forms: four masculine and four feminine. Each gender has singular, dual and two plural patterns.
Masculine: أَفْعَلُ، أَفْعَلَانِ، أَفْعَلُونَ، أَفَاعِلُ.
Feminine: فُعْلَى، فُعْلَيَانِ، فُعْلَيَاتٌ، فُعَلٌ.
These are patterns, not eight unrelated roots. The letters fāʾ, ʿayn and lām stand for the root radicals. Both plural alternatives shown in the original table are retained.

4. Masculine singular: afʿal

أَفْعَلُ is the core masculine singular pattern. Its initial hamzah and vowel structure distinguish it from the ordinary active participle pattern فَاعِلٌ.

Word / formMeaning / explanation
أَكْبَرُbigger, from k-b-r.
أَصْغَرُsmaller, from ṣ-gh-r.
أَعْلَمُmore knowledgeable, from ʿ-l-m.

In “زَيْدٌ أَكْبَرُ مِنْ عَمْرٍو,” Zayd is compared with ʿAmr. The form expresses relative degree, not a past-tense action.

5. Masculine dual: afʿalāni

أَفْعَلَانِ is the masculine dual form, referring to two masculine entities possessing the quality to a greater degree. In the source's nominative paradigm, the dual ending is -āni.

Word / formMeaning / explanation
أَكْبَرُ ← أَكْبَرَانِtwo greater/bigger males.
أَصْغَرُ ← أَصْغَرَانِtwo smaller males.
أَعْلَمُ ← أَعْلَمَانِtwo more knowledgeable males.

These are nominative paradigm forms; the dual ending can change under other syntactic cases.

6. Masculine sound plural: afʿalūna

One masculine plural pattern is أَفْعَلُونَ, adding the nominative sound-masculine plural ending -ūna.

Word / formMeaning / explanation
أَكْبَرُونَbigger/greater men.
أَصْغَرُونَsmaller men.
أَعْلَمُونَmen who are more knowledgeable.

The textbook exercise asks for the meaning of أَعْلَمُونَ. Although its lexical quality relates to knowledge, the form is a masculine plural comparative noun/adjective, not a past-tense verb.

7. Broken masculine plural: afāʿil

The second masculine plural pattern is أَفَاعِلُ. It is a broken plural: the internal pattern changes instead of simply adding -ūna.

Word / formMeaning / explanation
أَكْبَرُ ← أَكَابِرُgreater or eminent people.
أَصْغَرُ ← أَصَاغِرُlesser or junior people.
أَضْرَبُ ← أَضَارِبُa paradigmatic broken plural for people stronger in striking.

The source exercise specifically includes أَضَارِبُ. Its morphology is the afāʿil pattern, not the -ūna plural.

8. Feminine singular: fuʿlā

The feminine singular pattern is فُعْلَى. It does not arise merely by adding tāʾ marbūṭah to the masculine comparative; the stem pattern changes.
أَكْبَرُ ← كُبْرَى — bigger/greatest, feminine.
أَصْغَرُ ← صُغْرَى — smaller/smallest, feminine.
For instance, الْأُخْتُ الْكُبْرَى means “the elder sister,” with a feminine comparative adjective. “أَكْبَرَةٌ” is not the feminine formation taught in this paradigm.

9. Feminine dual: fuʿlayāni

فُعْلَيَانِ is the feminine dual pattern. When the singular ending -ā (alif maqṣūrah) enters the dual paradigm, a yāʾ becomes visible before the dual suffix.
كُبْرَى ← كُبْرَيَانِ — two bigger/greater feminine entities.
صُغْرَى ← صُغْرَيَانِ — two smaller feminine entities.
These are noun/adjective inflections of dual number, not imperfect or imperative verb conjugations. The source lists them as formal morphological slots.

10. Feminine sound plural: fuʿlayāt

One feminine plural pattern is فُعْلَيَاتٌ. It shows a yāʾ related to the singular's final alif maqṣūrah and then the feminine plural ending -āt.

Word / formMeaning / explanation
كُبْرَيَاتٌgreater/bigger feminine entities.
صُغْرَيَاتٌsmaller feminine entities.
سُمْعَيَاتٌwomen characterised as hearing more; this form appears in the source exercise.

The -yāt sequence identifies this plural formation, whereas the next pattern uses an internal broken-plural change.

11. Feminine broken plural: fuʿal

The second feminine plural pattern is فُعَلٌ, a broken plural. Rather than adding -āt, it changes the internal template.
كُبْرَى ← كُبَرٌ — a formal plural pattern related to greater feminine entities.
صُغْرَى ← صُغَرٌ — a formal plural pattern related to smaller feminine entities.
The two entries فُعْلَيَاتٌ and فُعَلٌ must be kept separate. They differ morphologically, and actual lexical usage does not necessarily employ both alternatives equally for every root.

12. Complete eight-form paradigm: akbar

With the root k-b-r, the complete textbook eight-slot paradigm is:

Word / formMeaning / explanation
أَكْبَرُone greater/bigger male.
أَكْبَرَانِtwo greater males.
أَكْبَرُونَmasculine sound plural.
أَكَابِرُeminent/great persons; masculine broken plural.
كُبْرَىone greater feminine entity.
كُبْرَيَانِfeminine dual.
كُبْرَيَاتٌfeminine sound plural.
كُبَرٌa second feminine plural pattern.

These are paradigm forms; real-world idiomatic frequency varies across entries.

13. The aʿṣghar / ṣughrā pair

أَصْغَرُ and صُغْرَى form another key masculine/feminine pair. Both have the root ṣ-gh-r, but their patterns differ.

Word / formMeaning / explanation
أَصْغَرُsmaller, masculine singular, on afʿal.
صُغْرَىsmaller, feminine singular, on fuʿlā.
أَصْغَرُونَmasculine sound-plural paradigm form.
صُغْرَيَاتٌfeminine sound-plural paradigm form.

The ordinary adjective ṣaghīr means “small”; the comparative pattern expresses a higher degree of smallness relative to something else.

14. The source’s triliteral-base rule

Core rule: the book introduces direct ism al-tafḍīl from an unaugmented triliteral past verb: أَفْعَلُ for masculine singular and فُعْلَى for feminine singular.
k-b-r → أَكْبَرُ / كُبْرَى.
ṣ-gh-r → أَصْغَرُ / صُغْرَى.
ʿ-l-m → أَعْلَمُ.
Simply attaching hamzah to any word is not enough; the root and entire pattern must be right. Classical morphology also has lexical/grammatical restrictions on direct comparatives, so the beginner rule is not an unlimited licence to coin forms.

15. Limits of direct formation

Source rule: an augmented/non-triliteral perfect verb does not yield a directly formed regular أَفْعَلُ comparative by the simple Form-I rule. For example, أَكْرَمَ belongs to augmented Form IV; copying all of its additional letters into afʿal is not valid direct formation.
To express a corresponding comparative meaning, Arabic commonly uses forms such as “أَكْثَرُ” or “أَشَدُّ” together with a verbal noun or appropriate phrase, e.g. “أَكْثَرُ إِكْرَامًا” (“showing more generosity/honour”).
This last illustration clarifies the book's basic restriction rather than quoting a further sentence from it.

16. Comparative, participle and finite verb

Look-alike forms can have distinct morphological functions.

Word / formMeaning / explanation
عَالِمٌa knowledgeable person; an active participle/descriptive noun.
أَعْلَمُmore knowledgeable; an ism al-tafḍīl.
عَلِمَhe knew or learned; a perfect verb.

Likewise, ضَارِبٌ means “one who strikes,” while the formal comparative أَضْرَبُ indicates a greater degree of striking. A shared root alone does not justify treating a past action, ordinary description and comparison as identical.

17. Comparison with min

A comparison may name its reference point with مِنْ (“than”).
زَيْدٌ أَعْلَمُ مِنْ عَمْرٍو — Zayd is more knowledgeable than ʿAmr.
هَذَا الْبَيْتُ أَكْبَرُ مِنْ ذَاكَ — This house is bigger than that one.
The noun following min supplies the standard of comparison; the comparative says the subject exceeds it in degree. In the common comparative construction with min, the masculine singular afʿal can remain unchanged even for feminine or plural referents. The eight-slot table is a paradigm, not an obligatory surface pattern in every sentence.

18. Book exercise: forms of asmaʿ

The book asks the learner to give the full paradigm of أَسْمَعُ. Using the root s-m-ʿ in the eight patterns yields:

Word / formMeaning / explanation
أَسْمَعُmasculine singular.
أَسْمَعَانِmasculine dual.
أَسْمَعُونَmasculine sound plural.
أَسَامِعُmasculine broken plural.
سُمْعَىfeminine singular.
سُمْعَيَانِfeminine dual.
سُمْعَيَاتٌfeminine sound plural.
سُمَعٌfeminine broken plural.

These are morphological exercise forms; frequency in living Arabic varies by form.

19. Book exercise: amnaʿ and aʿlam

The first source exercise also asks for أَمْنَعُ and أَعْلَمُ. The same eight templates apply, but the root consonants differ.

Word / formMeaning / explanation
أَمْنَعُmore resistant/restraining, root m-n-ʿ.
أَمْنَعَانِ / أَمْنَعُونَ / أَمَانِعُits other masculine slots.
أَعْلَمُmore knowledgeable, root ʿ-l-m.
أَعْلَمَانِ / أَعْلَمُونَ / أَعَالِمُits other masculine slots.

The exercise combines root identification, gender/number and the sense of greater degree. The plural entries are presented as pattern drills, not claims that each is equally idiomatic.

20. Analysing three source exercise forms

The second textbook exercise contrasts three patterns.

Word / formMeaning / explanation
أَعْلَمُونَafʿalūna, masculine sound plural: men more knowledgeable.
سُمْعَيَاتٌfuʿlayāt, feminine sound plural: women who hear more.
أَضَارِبُafāʿil, masculine broken plural: a paradigmatic form of people who strike more.

The word's first letter alone will not identify the form. The endings -ūna and -yāt, and the internal alif of afāʿil, identify different plural formations.

21. Translating the source prompts

The textbook ends with four Urdu-to-Arabic prompts. Morphological exercise answers include:
Two men who hear more → أَسْمَعَانِ.
Two women who strike more → ضُرْبَيَانِ.
All women who know more → عُلْمَيَاتٌ.
All men who hear more → أَسْمَعُونَ (sound plural); أَسَامِعُ is the other masculine plural template.
These are exercises in the source's paradigm, not a claim that every derived form is equally common or the most idiomatic form in contemporary speech.

22. Integrating meaning, root and pattern

To analyse an ism al-tafḍīl, identify three things together: the quality expressed to a greater degree, the three root radicals, and which of the eight paradigm patterns appears.

Word / formMeaning / explanation
أَعْلَمُmore knowledgeable, masculine singular afʿal.
أَعْلَمُونَmasculine sound plural.
كُبْرَىgreater, feminine singular fuʿlā.
أَضَارِبُmasculine broken plural afāʿil.

Different roots give different qualities, while the formal pattern gives gender and number. The next chapter turns to ism al-ẓarf, naming the time or place of an action.