The Muʿrab Noun — Definition

1. Definition of the Muʿrab Noun

فَصْلٌ: فِي تَعْرِيفِ الْاسْمِ الْمُعْرَبِ، وَهُوَ: كُلُّ اسْمٍ رُكِّبَ مَعَ غَيْرِهِ، وَلَا يُشْبِهُ مَبْنِيَّ الْأَصْلِ،
Translation: Section on the definition of a declinable noun. It is any noun occurring with another word in a grammatical construction and not resembling something inherently indeclinable.

The author places two conditions in the definition: entering a grammatical construction and avoiding resemblance to inherently fixed forms. The following passage illustrates them.

2. Examples in the Definition of the Muʿrab Noun

أَعْنِي الْحَرْفَ وَالْأَمْرَ الْحَاضِرَ وَالْمَاضِيَ، نَحْوُ: «زَيْدٍ» فِي «قَامَ زَيْدٌ»، لَا «زَيْدٌ» وَحْدَهُ، لِعَدَمِ التَّرْكِيبِ، وَلَا «هَؤُلَاءِ» فِي «قَامَ هَؤُلَاءِ»، لِوُجُودِ الشَّبَهِ، وَيُسَمَّى مُتَمَكِّنًا.
Translation: By inherently fixed forms the author means particles, commands directed to someone present, and past-tense verbs.

For example, “Zayd” in “Zayd stood” is a declinable noun. “Zayd” standing alone has not been used in the grammatical construction described here.

Likewise, “hāʾulāʾi” in “These people stood” is excluded owing to resemblance to inherently fixed forms.

Such a declinable noun is called mutamakkin.

The source wording is preserved, with vowel marks added as reading aids.

3. The four clauses of the definition

Read the definition clause by clause

كُلُّ اسْمٍ
Translation: every noun. The subject here is nouns, not all types of words.

رُكِّبَ مَعَ غَيْرِهِ
Translation: joined with something else in a grammatical construction.

وَلَا يُشْبِهُ مَبْنِيَّ الْأَصْلِ
Translation: and not resembling what is inherently indeclinable.

وَيُسَمَّى مُتَمَكِّنًا
Translation: it is also called mutamakkin.

The remaining slides explain each condition through examples and syntactic analysis.

4. The main idea

Iʿrāb is the grammatical status of a word that, in the appropriate position, can show nominative, accusative, or genitive marking.

A muʿrab noun is eligible for this change; a mabnī noun retains a fixed form even when its grammatical role changes.

We will study the full details of case marking in the next level.

5. Condition one: joined in a construction

رُكِّبَ مَعَ غَيْرِهِ
Translation: joined with another word in a grammatical construction.

The name «زَيْدٌ» alone does not specify whether it is a subject or object. In «قَامَ زَيْدٌ», the noun is grammatically connected to the verb and its syntactic role is known.

This describes how the noun is used in syntax. It does not mean that an isolated proper name becomes inherently indeclinable.

• construction

6. Parse the book’s first example

قَامَ زَيْدٌ
Translation: Zayd stood.

قَامَ: a past-tense verb, built on fatḥ.
زَيْدٌ: the subject (fāʿil), nominative with a visible ḍamma.

This is the construction the original text uses to show the syntactic relationship and the noun's case.

• parsing

7. Condition two: not like the inherently mabnī

وَلَا يُشْبِهُ مَبْنِيَّ الْأَصْلِ
Translation: and not resembling inherently fixed forms.

The book names three kinds of inherently fixed forms: particles, commands directed to the addressee, and past-tense verbs. Their form is not varied by nominative, accusative, or genitive case factors acting on nouns.

Teaching examples
«فِي»: a preposition, “in”.
«اُكْتُبْ»: an imperative, “write!”.
«كَتَبَ»: a past verb, “he wrote”.

These examples are not categories of noun; they illustrate what “inherently mabnī” means.

• inherently fixed

8. A useful distinction

The definition concerns nouns.

A particle such as “فِي” is not called a mabnī noun: it is a particle.

A past verb such as “كَتَبَ” is a verb. An imperative such as “اُكْتُبْ” is a verb. The book mentions all three as standard inherently mabnī forms, for comparison with a noun.

9. Why “هَؤُلَاءِ” is excluded

وَلَا «هَؤُلَاءِ» فِي «قَامَ هَؤُلَاءِ»، لِوُجُودِ الشَّبَهِ
Translation: nor “hāʾulāʾi” in “These people stood,” because of resemblance [to inherently fixed forms].

قَامَ هَؤُلَاءِ
Translation: These people stood.

«هَؤُلَاءِ» is a mabnī demonstrative noun. It serves as the subject, in the nominative position, but does not acquire the changing ḍamma that appears on «زَيْدٌ».

Remember: occupying a nominative position differs from displaying a changing nominative ending.

• muʿrab

10. Compare two subjects

قَامَ زَيْدٌ
Translation: Zayd stood.
«زَيْدٌ» is the subject and a declinable noun; its ḍamma marks nominative case.

قَامَ هَؤُلَاءِ
Translation: These people stood.
«هَؤُلَاءِ» is also the subject but is an indeclinable noun, in the nominative position without changing its form.

Conclusion: not every subject is a declinable noun.

• subjects

11. How to recognize case in practice

These are supplementary teaching examples, not quotations from the book's definition. They demonstrate how the same noun can take different case endings.

جَاءَ زَيْدٌ
Translation: Zayd came. «زَيْدٌ» is a nominative subject.

رَأَيْتُ زَيْدًا
Translation: I saw Zayd. «زَيْدًا» is an accusative direct object.

مَرَرْتُ بِزَيْدٍ
Translation: I passed by Zayd. «زَيْدٍ» is genitive after «بِـ».

The syntactic role and governing word determine the relevant case. Detailed rules follow in the next level.

• iʿrāb

12. A common misunderstanding

Muʿrab does not mean “a final vowel is always visibly different.”

Some declinable nouns have an estimated (non-visible) case ending, as in “مُوسَى”. Conversely, a mabnī noun may be in a different syntactic position without changing its fixed form.

Detailed visible and estimated endings come later.

13. What does “مُتَمَكِّن” mean?

وَيُسَمَّى مُتَمَكِّنًا
Translation: and it is called mutamakkin.

Mutamakkin is a technical name for the declinable noun defined here. It is not the ordinary meaning “powerful.”

Thus «زَيْدٌ» in «قَامَ زَيْدٌ» is both a declinable noun and an example of the mutamakkin class.

• mutamakkin

14. Mini parsing exercise

Try parsing both sentences before reading the answer. These are supplementary teaching examples, not the book's wording.

كَتَبَ خَالِدٌ
Translation: Khālid wrote.
«كَتَبَ»: past-tense verb, built on fatḥ.
«خَالِدٌ»: subject, nominative, declinable noun.

حَضَرَ هَؤُلَاءِ
Translation: These people arrived.
«حَضَرَ»: past-tense verb, built on fatḥ.
«هَؤُلَاءِ»: an indeclinable demonstrative noun, in the nominative position as subject.

Why are both subjects, yet only one has a changing case ending?

15. Lesson summary

1. The book defines the declinable noun through grammatical construction and the absence of resemblance to inherently fixed forms.
2. «زَيْدٌ» in «قَامَ زَيْدٌ» is a declinable noun and nominative subject.
3. «هَؤُلَاءِ» in «قَامَ هَؤُلَاءِ» is indeclinable, though in the nominative position as subject.
4. Another term for the declinable noun is mutamakkin.

Next level: changes in the word ending and visible versus estimated case marking.