Causes of Diptote Status — ʿAdl and Waṣf

1. The Book’s Definition of ʿAdl

أَمَّا الْعَدْلُ، فَهُوَ تَغَيُّرُ اللَّفْظِ مِنْ صِيغَتِهِ الْأَصْلِيَّةِ إِلَى صِيغَةٍ أُخْرَى تَحْقِيقًا أَوْ تَقْدِيرًا.
Translation: As for ʿadl, it is a word's shift from its original form to another form, either actually or by grammatical estimation.

Here lafẓ is the word and ṣīghah is its particular morphological form or pattern.

2. Three Parts of the Definition

Ṣīghatihi al-aṣliyyah: the form treated as original in the analysis.
Ilā ṣīghatin ukhrā: a different form reached from it.
Taḥqīqan aw taqdīran: the shift may be established as an actual formal alteration or posited in grammatical analysis.

Not every pair of differently shaped words is an instance of ʿadl. This is a technical cause established for particular classes of words.

3. Actual and Estimated ʿAdl

Actual ʿadl: the altered form is understood against an established original construction; distributive number expressions help illustrate it.

Estimated ʿadl: grammar treats a word as shifted from an original pattern even where that origin is not directly visible in ordinary use.

The book explicitly includes both in taḥqīqan aw taqdīran. The descriptions here explain that distinction rather than quote further lines.

4. Which Causes Can Combine with ʿAdl?

وَلَا يَجْتَمِعُ مَعَ وَزْنِ الْفِعْلِ أَصْلًا، وَيَجْتَمِعُ مَعَ الْعَلَمِيَّةِ، كَعُمَرَ وَزُفَرَ، وَمَعَ الْوَصْفِ، كَثُلَاثَ وَمَثْلَثَ وَأُخَرَ وَجُمَعَ.
Translation: ʿAdl does not combine with a verb pattern; it does combine with proper-name status, as in ʿUmar and Zufar, and with adjectival status, as in thulāth, mathlath, ukhar and jumaʿ.

To “combine” here means that two effective causes of preventing full declension occur in one word; it does not mean a plural form.

5. First Map of the Causes

ʿAdl + proper-name status: عُمَر and زُفَر, which the book lists as names involving ʿadl.

ʿAdl + adjectival status: ثُلَاث, مَثْلَث, أُخَر and جُمَع, the book's second group.

ʿAdl + verb-pattern cause: the book says this pairing does not occur.

These are combinations of causes, not syntactic roles such as subject or direct object.

6. ʿUmar: ʿAdl with a Proper Name

عُمَرُ is a proper name. The book identifies it as an example of ʿadl combined with proper-name status.

جَاءَ عُمَرُ — ʿUmar came. عُمَرُ is the nominative subject, with ḍamma but no tanwīn.

رَأَيْتُ عُمَرَ — I saw ʿUmar. عُمَرَ is the accusative object, with fatḥa but no tanwīn.

مَرَرْتُ بِعُمَرَ — I passed by ʿUmar. عُمَرَ is genitive after bi-, but its case marker is fatḥa as a diptote.

7. Full Parsing: جَاءَ عُمَرُ

جَاءَ عُمَرُ
Translation: ʿUmar came.

جَاءَ: past-tense verb, built on fatḥ.
عُمَرُ: nominative subject marked by visible ḍamma.

The absence of tanwīn results from the noun's diptote status. Its function as subject determines nominative case; ʿadl + proper-name status explain its declension class.

8. Full Parsing: رَأَيْتُ عُمَرَ

رَأَيْتُ عُمَرَ
Translation: I saw ʿUmar.

رَأَيْتُ: past-tense verb built on sukūn because the subject tāʾ is attached; «تُ» is an attached subject pronoun in the nominative position.
عُمَرَ: accusative direct object with visible fatḥa and no tanwīn.

Here fatḥa marks accusative. In «مَرَرْتُ بِعُمَرَ» the same visible fatḥa serves as the genitive marker instead.

9. Full Parsing: مَرَرْتُ بِعُمَرَ

مَرَرْتُ بِعُمَرَ
Translation: I passed by ʿUmar.

مَرَرْتُ: past-tense verb with attached first-person subject.
بِ: preposition.
عُمَرَ: genitive noun governed by bi-, taking fatḥa instead of kasra because it is a diptote.

The prepositional phrase relates to «مَرَرْتُ». Grammatical genitive case must not be confused with a visible kasra.

10. Zufar: A Second Proper-Name Example

The book mentions زُفَر alongside عُمَر as examples of ʿadl + proper-name status.

حَضَرَ زُفَرُ — Zufar attended. «زُفَرُ» is the nominative subject.
سَلَّمْتُ عَلَى زُفَرَ — I greeted Zufar. «زُفَرَ» is genitive after ʿalā, with fatḥa as the case marker.

These two sentences are teaching examples; the book's passage lists the name rather than these sentences.

11. Why Zayd Differs from ʿUmar

زَيْدٌ and عُمَرُ are both proper names.

زَيْدٌ، زَيْدًا، بِزَيْدٍ: Zayd is fully declinable and may take regular case vowels with tanwīn.

عُمَرُ، عُمَرَ، بِعُمَرَ: ʿUmar is a diptote, normally without tanwīn and with fatḥa in the genitive when neither al- nor iḍāfa changes that rule.

Proper-name status alone does not determine the difference: the other effective cause matters.

12. ʿAdl with Adjectival Words

The book lists ثُلَاث, مَثْلَث, أُخَر, and جُمَع for ʿadl + adjectival status.

ثُلَاث and مَثْلَث are distributive expressions meaning “three at a time / in threes.” أُخَر means “other” (feminine plural).

The original passage lists these forms; subsequent worked sentences are instructional elaborations, not further quotations from the book.

13. ثُلَاث: In Groups of Three

ثُلَاثَ means “three by three,” describing the distribution of a group, not merely counting to three.

دَخَلَ الطُّلَّابُ ثُلَاثَ
Translation: The students entered in groups of three.

دَخَلَ: past-tense verb. الطُّلَّابُ: nominative subject. ثُلَاثَ: accusative ḥāl (circumstantial qualifier), with fatḥa and no tanwīn.

The complete sentence is an instructional example; the source text itself lists «ثُلَاث».

14. Distributive ثُلَاث vs Number ثَلَاثَة

ثَلَاثَةٌ ordinarily expresses a count of three, while ثُلَاثَ expresses distribution in groups of three.

جَاءَ ثَلَاثَةُ طُلَّابٍ
Translation: Three students came. This states the number.

دَخَلَ الطُّلَّابُ ثُلَاثَ
Translation: The students entered in threes. This describes their distribution.

The distinction helps explain why distributive forms are considered in the discussion of ʿadl.

15. أُخَر: “Other” Feminine Plural

أُخَرَ is the feminine plural corresponding to «أُخْرَى», meaning “other.” The book includes it under ʿadl + adjectival status.

مِنْ أَيَّامٍ أُخَرَ
Translation: from other days.

مِنْ: preposition. أَيَّامٍ: genitive noun with kasra. أُخَرَ: adjective qualifying «أَيَّامٍ», itself grammatically genitive but marked with fatḥa as a diptote.

The phrase occurs in Qurʾān 2:184, within «فَعِدَّةٌ مِنْ أَيَّامٍ أُخَرَ».

16. Can an Adjective Be Genitive with Fatḥa?

In مِنْ أَيَّامٍ أُخَرَ:
1. أَيَّامٍ is genitive because it follows min.
2. أُخَرَ is the adjective of «أَيَّامٍ» and agrees in case.

Why does «أُخَرَ» visibly take fatḥa? Because it is a diptote and fatḥa stands in for kasra here.

Always distinguish a word's syntactic case from its visible case marker.

17. جُمَع: The Book’s Fourth Listed Example

Alongside ثُلَاث, مَثْلَث and أُخَر, the book also lists جُمَع.

Here the text supplies a list, not an independent parsing or complete sentence using «جُمَع». We therefore preserve it as a listed ʿadl + waṣf item without inventing a context.

Our practical exercises use the clearer, fully contextualized examples involving ثُلَاث and أُخَر.

18. The Book’s Definition of Waṣf

أَمَّا الْوَصْفُ، فَلَا يَجْتَمِعُ مَعَ الْعَلَمِيَّةِ أَصْلًا. وَشَرْطُهُ أَنْ يَكُونَ وَصْفًا فِي أَصْلِ الْوَضْعِ.
Translation: As for waṣf (adjectival status), it does not combine with proper-name status as a simultaneous cause. Its condition is that the word be adjectival in its original assignment.

Waṣf means a describing quality. Aṣl al-waḍʿ means the word's original lexical function.

The book stresses original adjectival use, not merely whether a word can now name someone or something.

19. Adjectival Status vs Proper-Name Status

Waṣf concerns a describing quality; ʿalamiyyah concerns use as a specific proper name.

In this causal classification, the book says waṣf and ʿalamiyyah are not counted together as the two operative reasons for diptote status.

A formerly descriptive word can later be used as a name; the book still directs attention to its original adjectival status, as its next examples explain.

20. Why Must Waṣf Be Original?

وَشَرْطُهُ أَنْ يَكُونَ وَصْفًا فِي أَصْلِ الْوَضْعِ
Translation: It is a condition that the word be adjectival in its original lexical assignment.

A word's ability to describe something today does not automatically make it a diptote. The technical conditions for an effective adjectival cause must hold.

The book contrasts inherently adjectival «أَسْوَد» with its later example «أَرْبَع» to explain this nuance.

21. أَسْوَد and أَرْقَم: Original Wording

فَـ«أَسْوَدُ» وَ«أَرْقَمُ» غَيْرُ مُنْصَرِفٍ، وَإِنْ صَارَا اسْمَيْنِ لِلْحَيَّةِ؛ لِأَصَالَتِهِمَا فِي الْوَصْفِيَّةِ.
Translation: Thus, aswad and arqam are diptotes even if they have become names for a snake, because they were originally adjectival.

The book highlights the persistence of original adjectival status. Their morphological verb-like pattern also matters when explaining the effective combination of causes.

22. أَسْوَد: Adjective plus Verb-like Pattern

أَسْوَدُ (“black”) is originally an adjective on the أَفْعَل pattern. The operative combination here is adjectival status + verb-like pattern.

جَاءَ رَجُلٌ أَسْوَدُ
Translation: A black man came.

رَجُلٌ: nominative subject with ḍamma and tanwīn. أَسْوَدُ: nominative adjective modifying «رَجُلٌ», with ḍamma but no tanwīn.

The sentence is an instructional example; the book supplies the word «أَسْوَد».

23. Agreement in Case, Different Marker

مَرَرْتُ بِرَجُلٍ أَسْوَدَ
Translation: I passed by a black man.

مَرَرْتُ: past verb with subject tāʾ. بِ: preposition.
رَجُلٍ: genitive noun, marked by kasra and tanwīn.
أَسْوَدَ: genitive adjective of «رَجُلٍ», marked by fatḥa as a diptote.

Both noun and adjective are grammatically genitive, though their visible markers differ.

24. أَرْقَم: Original Adjectival Status Remains Relevant

According to the book, the original adjectival character of أَرْقَم remains relevant even when the word is later used as a name for a snake.

أَرْقَمُ: nominative, without tanwīn. رَأَيْتُ أَرْقَمَ: accusative use. مَرَرْتُ بِأَرْقَمَ: genitive after bi-, marked with fatḥa.

These are hypothetical grammatical examples illustrating the rule, not statements about a particular event.

25. Why «أَرْبَع» Is Munṣarif Here

وَ«أَرْبَع» فِي قَوْلِكَ: «مَرَرْتُ بِنِسْوَةٍ أَرْبَعٍ» مُنْصَرِفٌ مَعَ أَنَّهُ صِفَةٌ وَوَزْنُ الْفِعْلِ؛ لِعَدَمِ الْأَصَالَةِ فِي الْوَصْفِيَّةِ.
Translation: In “I passed by four women,” «أَرْبَع» is fully declinable, even though it has descriptive use and a verb-like pattern, because its adjectival character is not original.

This exception matters: surface resemblance to an adjective or verb pattern is not sufficient to establish diptote status.

26. Parsing the Book’s «أَرْبَعٍ» Example

مَرَرْتُ بِنِسْوَةٍ أَرْبَعٍ
Translation: I passed by four women.

مَرَرْتُ: past verb with attached first-person subject. بِ: preposition.
نِسْوَةٍ: genitive noun governed by bi-, with kasra and tanwīn.
أَرْبَعٍ: numerical modifier of «نِسْوَةٍ», genitive with kasra and tanwīn; the book classifies this use as munṣarif.

Do not call it a diptote merely because its visible pattern resembles the verb pattern.

27. Original Waṣf: أَسْوَد vs أَرْبَع

أَسْوَدُ: originally adjectival; its verb-like pattern contributes to diptote status.

أَرْبَعٍ: in the numerical construction cited by the book, this is fully declinable because adjectival function is not original.

An outer resemblance to the أَفْعَل pattern is not enough: the word's original lexical function and the rule's conditions matter.

Treating both alike would erase the book's explicit restriction.

28. Do Not Confuse the Two Combinations

ʿAdl + proper name: عُمَر, زُفَر.
ʿAdl + adjectival status: ثُلَاث, مَثْلَث, أُخَر, جُمَع.
Original adjectival status + verb pattern: أَسْوَد, أَرْقَم.

The book does not count proper-name status + waṣf as a simultaneous pair here, and it also excludes ʿadl + verb pattern.

Different causes can produce the same visible diptote endings.

29. Case-Ending Comparison

Munṣarif: زَيْدٌ — زَيْدًا — بِزَيْدٍ.
ʿAdl + proper name: عُمَرُ — عُمَرَ — بِعُمَرَ.
Adjective + verb pattern: أَسْوَدُ — أَسْوَدَ — بِأَسْوَدَ (without al- or iḍāfa).

Nominative may show ḍamma, accusative fatḥa, while genitive of an ordinary diptote is marked with fatḥa.

«بِعُمَرَ» is grammatically genitive, despite the visible fatḥa.

30. Adjective–Noun Agreement in Case

In مِنْ أَيَّامٍ أُخَرَ, both «أَيَّامٍ» and «أُخَرَ» are genitive, but one is marked with kasra and the other with fatḥa.

The same is true in بِرَجُلٍ أَسْوَدَ.

Rule: an adjective follows the syntactic case of its noun, but the visible case marker need not be identical when the two words belong to different declension classes.

31. Remember the Earlier Genitive Exception

As established previously, a diptote with the definite article al-, or when used as a muḍāf, may take kasra in the genitive.

Our examples with ʿUmar, ukhar, and aswad are selected without those conditions, so genitive fatḥa appears.

Today's main skill is identifying the cause of diptote status while retaining the earlier exception.

32. Four Common Mistakes

1. “Every proper name is a diptote”: false. «زَيْدٌ» is fully declinable.
2. “Every adjective is a diptote”: false. The book cites «أَرْبَعٍ» as a counterexample.
3. “Every visible fatḥa means accusative”: false. Both «بِعُمَرَ» and «أُخَرَ» can be genitive with fatḥa.
4. “Any change of form is ʿadl”: false. It is a defined technical cause.

For each word, separately explain cause, syntactic case, and case marker.

33. Worked Exercise: Three Genitives

مَرَرْتُ بِعُمَرَ: ʿUmar is genitive after bi-, marked with fatḥa; cause: ʿadl + proper-name status.

مِنْ أَيَّامٍ أُخَرَ: ukhar is a genitive adjective of ayyāmin, marked with fatḥa; cause: ʿadl + adjectival status.

مَرَرْتُ بِرَجُلٍ أَسْوَدَ: aswad is a genitive adjective of rajulin, marked with fatḥa; cause: original adjectival status + verb-like pattern.

All three visibly end in fatḥa, but the underlying causes differ.

34. Lesson 13 Summary

ʿAdl: shift from an original form to another, actual or estimated.
ʿAdl + proper-name status: ʿUmar and Zufar. ʿAdl + adjectival status: thulāth, mathlath, ukhar and jumaʿ.

Waṣf must be original; aswad and arqam retain original adjectival status, alongside a verb-like pattern.

The book's أَرْبَعٍ example is fully declinable, clarifying that originality matters.

Keep three questions distinct: what causes the declension class, what is the syntactic case, and which ending marks it.