Adjective Agreement in Arabic

Overview

In Arabic, adjectives follow the noun they describe and must agree with it in four ways: gender, number, definiteness, and case. This agreement system is more extensive than in English, where adjectives are invariable. Understanding adjective agreement is a fundamental skill at the A1 level because adjectives appear in almost every description you will make.

The basic pattern is straightforward: a masculine noun takes a masculine adjective, a feminine noun takes a feminine adjective (usually by adding ة), a definite noun takes a definite adjective (with ال), and an indefinite noun takes an indefinite adjective (with tanwin).

When both noun and adjective carry ال, you have a descriptive phrase ("the big house"). When neither has ال, you also have a phrase ("a big house"). But if the noun has ال and the adjective does not, you actually have a complete sentence ("the house is big").

How It Works

Gender Agreement

Noun Gender	Adjective Form	Example
Masculine	Base form	كتاب جديد (a new book)
Feminine	Add ة	مدرسة جديدة (a new school)

Definiteness Agreement

Noun	Adjective	Result
Indefinite: كتاب	Indefinite: جديد	كتاب جديد (a new book -- phrase)
Definite: الكتاب	Definite: الجديد	الكتاب الجديد (the new book -- phrase)
Definite: الكتاب	Indefinite: جديد	الكتاب جديد (the book is new -- sentence!)

Number Agreement (Human vs. Non-Human)

Noun Type	Plural Adjective Rule
Human plural	Adjective matches: معلمون جدد (new male teachers)
Non-human plural	Adjective is feminine singular: كتب جديدة (new books)

Examples in Context

Arabic	English	Note
كتاب جديد	a new book	Both indefinite, masculine
الكتاب الجديد	the new book	Both definite, masculine
طالبة ذكية	a smart female student	Feminine agreement
البيت الكبير	the big house	Both definite
سيارة حمراء	a red car	Feminine of أحمر is حمراء
الطلاب الجدد	the new students (male)	Human plural agreement
بيوت جميلة	beautiful houses	Non-human plural = feminine singular adjective
المدينة القديمة	the old city	Feminine definite
رجل طويل	a tall man	Masculine indefinite
الأولاد الصغار	the little children	Human plural

Common Mistakes

Wrong	Right	Why
كتاب الجديد	كتاب جديد or الكتاب الجديد	Both must match in definiteness
كتب جديدون	كتب جديدة	Non-human plurals take feminine singular adjective
مدينة كبير	مدينة كبيرة	Feminine noun requires feminine adjective
الجديد الكتاب	الكتاب الجديد	Adjective comes after the noun in Arabic

Practice Tips

• When learning a new adjective, always practice it with both masculine and feminine nouns: طويل/طويلة, كبير/كبيرة, جميل/جميلة.
• Remember the critical rule for non-human plurals: they take feminine singular adjectives. This is one of the most distinctive features of Arabic grammar.
• Practice making phrases vs. sentences by toggling ال: الكتاب الجديد (the new book) vs. الكتاب جديد (the book is new).

Related Concepts

• Noun Gender
• Comparative and Superlative
• Nisba Adjectives
• Colors