Arabic Grammar (Iʿrab): Noun Endings Explained Simply

Title for Arabic Grammar blogpost showing noun endings and examples of iʿrāb (Iʿraab) in Arabic and from the Quran.

A Brief Background on Iʿrāb

The term Iʿrāb (إعراب) literally means “to express clearly.” In Arabic linguistics, it refers to the way a word’s ending expresses its grammatical role. This feature makes Arabic one of the most precise languages in the world. Early Arab scholars like Sībawayh, the father of Arabic grammar, developed detailed systems to preserve this linguistic beauty, especially for understanding the Quran correctly.

Understanding Arabic grammar begins with mastering iʿrab (إعراب) – the system of changing noun endings that reveals meaning, role, and context in a sentence. Whether you’re learning Arabic for Quran study, classical texts, or conversation, knowing these endings transforms how you read and comprehend the language.

Why Learning Iʿrāb Matters

Without understanding iʿrāb (Arabic Grammar), it’s easy to misinterpret an Arabic sentence. For example, the difference between اللَّهُ (Allāhu) and اللَّهَ (Allāha) changes whether Allah is performing the action of the verb or receiving it, a major grammatical shift that completely alters the meaning.

Word Classification

In Arabic grammar, every word falls into one of three main categories:

  • اِسْم (ism): Noun e.g., كِتَاب (kitāb) – “book”
  • فِعْل (fiʿl): Verb e.g., كَتَبَ (kataba) – “he wrote”
  • حَرْف (ḥarf): Particle e.g., فِي (fī) – “in”

While I’raab can affect most nouns and verbs, the vast majority of learners focus on noun endings in the beginning (rightly so!).

Arabic Grammar: There are Two Types of Nouns

Arabic nouns are divided into two main types:

A) مُعْرَب (Muʿrab):
Nouns with I’rab! Nouns that change their endings depending on grammatical case.

B) مَبْنِيّ (Mabnī):
Nouns that have fixed endings (no I’rab), such as pronouns, nouns of pointing and particles.

Iʿrab Endings Explained

Let’s look at how noun endings change in Arabic grammar.

For Indefinite Nouns (without “ال”)

CaseEndingExamplePronunciation
Marfūʿ (Nominative)ٌكِتَابٌkitābun
Manṣūb (Accusative)ًكِتَابًاkitāban
Majrūr (Genitive)ٍكِتَابٍkitābin

For Definite Nouns (with “ال”)

CaseEndingExamplePronunciation
Marfūʿ (Nominative)ُاَلْكِتَابُal-kitābu
Manṣūb (Accusative)َاَلْكِتَابَal-kitāba
Majrūr (Genitive)ِاَلْكِتَابِal-kitābi

Key Notes for Learning Arabic Grammar

  • The accusative (Manṣūb) case often adds fatḥah or tanwīn fatḥah (ً ).
  • Prepositions such as فِي, مِن, and عَلَى always cause the genitive (Majrūr) case.
  • The tanwīn (the “-n” sound) disappears when a noun becomes definite with “ال”.

Common Mistakes to Avoid

  1. Mixing up tanwīn (ً ٌ ٍ) and single vowels (َ ُ ِ).
  2. Dropping noun endings when pronouncing verses or sentences.

Tips for Mastering Arabic Grammar

So when you read the Quran next time, try to analyse simple āyāt by focusing on the endings of the words. Start with short verses from the Quran and identify each noun’s case. You’ll begin to appreciate how Iʿrāb (Iʿraab) beautifully connects meaning and structure in Arabic grammar, revealing the depth and precision of the Qur’an’s language. Practice saying the endings aloud: Arabic is rhythmic, and pronunciation reinforces memory.

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Iʿrāb in the Qur’an: Understanding Through Different Nouns

Let’s look at another example of how Iʿrāb (Iʿraab) affects meaning in the Quran.

Example 1:

رَبُّنَا اللَّهُ
Transliteration: Rabbunā Allāhu
Translation: Our Lord is Allah.

Here, رَبُّنَا (Rabbunā) means our Lord, and اللَّهُ (Allāhu) ends with a ḍammah (ـُ) showing it is Marfūʿ (nominative). This indicates that Allah is the One being described as our Lord.

Example 2:

آمَنَّا بِرَبِّ الْعَالَمِينَ
Transliteration: Āmannā bi-Rabbi al-ʿālamīn
Translation: We believe in the Lord of the worlds.

In this verse, رَبِّ (Rabbi) ends with a kasrah (ـِ) because it follows the preposition بِـ (bi). This makes it Majrūr (genitive), showing a relationship of “in” or “with.”

Example 3:

وَاتَّقُوا رَبَّكُمُ الَّذِي خَلَقَكُمْ
Transliteration: Wattaqū Rabbakum alladhī khalaqakum
Translation: And fear your Lord, Who created you.

Here, رَبَّكُم (Rabbakum) ends with a fatḥah (ـَ), showing it is Manṣūb (accusative). This is the object of the verb اتَّقُوا (wattaqū) meaning “fear.”

So, in these three examples : رَبُّ (Rabbun), رَبِّ (Rabbi), and رَبَّ (Rabba). The same noun changes its ending to reflect its grammatical role:

  • Rabbun (Marfūʿ) is the subject or predicate
  • Rabba (Manṣūb) is the object of a verb
  • Rabbi (Majrūr) comes after a preposition

This simple yet powerful system is what makes Arabic so precise. Iʿrāb doesn’t just decorate the language; it defines meaning.

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Explanation of قال and its derivatives/uses

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