Adjective Agreement in Arabic

In Brief

An Arabic adjective normally comes after the noun it describes: كتاب جديد means “a new book,” literally “book new.” It matches that noun in gender, number, and definiteness—and in fully vocalized formal Arabic, in case as well. Start with the dependable A1 pattern noun + adjective, making both words indefinite (كتاب جديد) or both definite (الكتاب الجديد).

Overview

An adjective is a describing word such as “new,” “large,” or “intelligent.” A noun names a person, place, thing, or idea. English usually puts the adjective first and leaves it unchanged: “a new book,” “a new car,” and “new books.” Modern Standard Arabic normally reverses that order and changes the adjective to match the noun.

This agreement is introduced at A1 because it appears in basic descriptions, introductions, shopping, and everyday reading. Once you know the gender of a noun, you can build useful phrases such as بيت كبير “a big house,” سيارة جديدة “a new car,” and الطلاب المجتهدون “the hardworking students.”

The simplest rule covers singular nouns: put the noun first, choose the masculine or feminine adjective form, and match the presence or absence of الـ “the.” Arabic also has dual and plural agreement, formal case endings, and a major special rule for plurals that refer to things rather than people. Those details are explained below, with the beginner rule kept separate from the later refinements.

How It Works

The basic order: noun, then adjective

An adjective used attributively—as part of a phrase such as “the big house”—follows its noun:

• بيت كبير — a big house
• البيت الكبير — the big house
• طالبة ذكية — a smart female student

This is the opposite of the usual English order. Think “house big,” not “big house.” Do not place the adjective before the noun in an ordinary descriptive phrase.

Agreement in gender

Arabic nouns are grammatically masculine or feminine. “Grammatical gender” means the noun belongs to a word class; it does not always describe biological sex. The common feminine marker is ة (tāʾ marbūṭa), and many adjectives form their feminine by adding it.

Noun type	Noun	Adjective	Complete phrase
Masculine singular	طالب “male student”	ذكي “smart”	طالب ذكي
Feminine singular	طالبة “female student”	ذكية “smart”	طالبة ذكية
Masculine singular	بيت “house”	كبير “big”	بيت كبير
Feminine singular	مدينة “city”	كبيرة “big”	مدينة كبيرة

Not every feminine noun ends in ة. For example, شمس “sun” is feminine, so “the bright sun” is الشمس الساطعة. Learn a noun together with its gender rather than relying only on its final letter.

Some adjective pairs have a different pattern instead of simply adding ة. Color adjectives provide common examples: أحمر / حمراء “red” and أبيض / بيضاء “white.” Their forms are irregular from an A1 learner’s point of view, but agreement still works: كتاب أحمر “a red book,” سيارة حمراء “a red car.”

Agreement in definiteness

A word is definite when it points to an identifiable person or thing—roughly “the X” rather than “an X.” With an ordinary noun phrase, both noun and adjective take الـ:

Meaning	Arabic	Pattern
a new book	كتاب جديد	indefinite noun + indefinite adjective
the new book	الكتاب الجديد	definite noun + definite adjective
a large house	بيت كبير	indefinite noun + indefinite adjective
the large house	البيت الكبير	definite noun + definite adjective

The definite article is attached to the word, so write الجديد, not ال جديد. In pronunciation, the l of الـ assimilates before a “sun letter,” but spelling does not change: الطالبة الذكية “the smart female student.”

Definiteness also reveals an important difference between a phrase and a complete sentence:

• البيت الكبير — the big house
• البيت كبير — the house is big

Arabic can make a present-tense sentence without a written equivalent of English “is.” In البيت كبير, the definite noun is the topic and the indefinite adjective tells you something about it. Adding الـ to the adjective changes the words into the single noun phrase “the big house.”

Agreement in number

Arabic distinguishes singular (one), dual (two), and plural (three or more). With people, an adjective generally matches the noun’s number and gender.

Number and gender	Indefinite phrase	Meaning
Masculine singular	طالب ذكي	a smart male student
Feminine singular	طالبة ذكية	a smart female student
Masculine dual	طالبان ذكيان	two smart male students
Feminine dual	طالبتان ذكيتان	two smart female students
Masculine plural	طلاب أذكياء	smart male students / smart students
Feminine plural	طالبات ذكيات	smart female students

The dual forms shown here are in the nominative case (the form commonly used for a sentence subject). In other grammatical roles, ـان / ـتان becomes ـين / ـتين, and the adjective changes with it: رأيت طالبين ذكيين “I saw two smart students.” You do not need to master those endings to begin making singular descriptions.

The non-human plural rule

A plural referring to non-human things or animals normally takes a feminine singular adjective in Modern Standard Arabic. This is sometimes called “deflected agreement”: the noun looks plural, but its adjective has feminine singular form.

• كتب جديدة — new books
• بيوت كبيرة — big houses
• سيارات سريعة — fast cars
• الكلاب الصغيرة — the small dogs

This rule is essential even though it may feel surprising to an English speaker. Compare طلاب جدد “new students,” where a human plural receives a plural adjective, with كتب جديدة “new books,” where a non-human plural receives feminine singular جديدة.

Agreement in case

Case is a change at the end of a noun or adjective that marks its role in a formal sentence—for example, whether it is a subject or follows a preposition. In fully vocalized Modern Standard Arabic, the adjective carries the same case as its noun.

Case	Indefinite	Definite	Typical role
Nominative	كتابٌ جديدٌ	الكتابُ الجديدُ	often a subject
Accusative	كتابًا جديدًا	الكتابَ الجديدَ	often a direct object (the thing acted on)
Genitive	كتابٍ جديدٍ	الكتابِ الجديدِ	after a preposition or as a possessor

Most everyday Arabic text omits the short-vowel marks, so all three indefinite rows are usually printed كتاب جديد. The sentence around them supplies the grammatical information. Case is nevertheless part of full agreement in careful recitation, formal instruction, and vocalized texts.

More than one adjective

Several adjectives can follow one noun. Each one agrees with that noun:

• بيت كبير جميل — a large, beautiful house
• السيارة الجديدة السريعة — the new, fast car
• كتب عربية مفيدة — useful Arabic books

In the last example, كتب is a non-human plural, so both عربية and مفيدة are feminine singular.

Examples in Context

Arabic	English	Note
اشتريت كتابًا جديدًا.	I bought a new book.	Masculine singular; both words are indefinite and accusative.
الكتاب الجديد على الطاولة.	The new book is on the table.	Both noun and adjective are definite.
هذه طالبة ذكية.	This is a smart female student.	Feminine ذكية matches طالبة.
البيت الكبير قريب من هنا.	The big house is near here.	Masculine singular and definite.
السيارة الجديدة سريعة.	The new car is fast.	الجديدة describes the noun; سريعة is the predicate “is fast.”
هذان طالبان مجتهدان.	These are two hardworking students.	Masculine dual nominative agreement.
قابلت طالبتين مجتهدتين.	I met two hardworking female students.	Feminine dual accusative agreement.
الطلاب الجدد في الصف.	The new students are in the classroom.	Human masculine plural takes a plural adjective.
الطالبات الجديدات في المكتبة.	The new female students are in the library.	Human feminine plural agreement.
قرأت كتبًا مفيدة.	I read useful books.	Non-human plural takes feminine singular مفيدة.
هذه بيوت قديمة.	These are old houses.	Non-human plural with feminine singular قديمة.
نحتاج إلى سيارات سريعة وصغيرة.	We need fast, small cars.	Both adjectives use feminine singular agreement.
السماء زرقاء اليوم.	The sky is blue today.	Feminine noun with the feminine color form زرقاء.
رأيت قمرًا جميلًا في سماء صافية.	I saw a beautiful moon in a clear sky.	Adjectives match gender and case in two indefinite phrases.

Common Mistakes

Putting the adjective before the noun

• Wrong: جديد كتاب
• Right: كتاب جديد
• Why: An ordinary Arabic attributive adjective follows the noun. English word order is not transferred directly.

Making only the noun definite

• Wrong for “the new book”: الكتاب جديد
• Right: الكتاب الجديد
• Why: The intended phrase requires الـ on both words. الكتاب جديد is grammatical, but it means the complete sentence “The book is new.”

Ignoring feminine agreement

• Wrong: طالبة ذكي
• Right: طالبة ذكية
• Why: The feminine noun طالبة requires the feminine adjective ذكية.

Using a plural adjective with a non-human plural

• Wrong in standard agreement: كتب جديدون
• Right: كتب جديدة
• Why: A non-human plural normally takes a feminine singular adjective. ـون is a human masculine plural ending and cannot describe books here.

Treating every plural alike

• Wrong: الطالبات الذكية
• Right: الطالبات الذكيات
• Why: الطالبات refers to human females, so the adjective is feminine plural. The feminine-singular rule applies to non-human plurals, not to this group of people.

Forgetting formal case agreement

• Wrong in fully vocalized formal Arabic: مررتُ بالبيتِ الكبيرُ
• Right: مررتُ بالبيتِ الكبيرِ
• Why: After بِـ “by/with,” the noun is genitive, and its adjective must also be genitive. In unvocalized writing, both forms appear simply as بالبيت الكبير.

Usage Notes

This article describes Modern Standard Arabic, the variety used in formal writing, news, education, and communication across regions. Spoken Arabic varieties also put many adjectives after nouns and show gender and definiteness agreement, but plural forms and agreement patterns vary. Learn the local spoken pattern separately rather than assuming every formal ending will be pronounced in conversation.

Short case vowels are usually absent from ordinary writing and are commonly not pronounced in everyday speech. Their omission does not remove gender, number, or definiteness agreement: المدينة الجميلة still visibly matches in those features even without vowel marks.

A proper name is already definite, so an adjective describing it is normally definite: مصر الجميلة “beautiful Egypt.” A noun with a possessive suffix is also definite: كتابي الجديد “my new book.” The noun كتابي does not take الـ, but its adjective does because the whole expression refers to a definite book.

Beyond the Basics / Advanced Use

You do not need to master this section at A1, but these patterns explain forms you will meet later.

Adjectives with an iḍāfa construction

An iḍāfa is a possession or “of” construction made by placing two nouns together. An adjective comes after the complete construction, and its agreement identifies which noun it describes:

• سيارةُ المديرِ الجديدةُ — the manager’s new car
• سيارةُ المديرِ الجديدِ — the new manager’s car

In the first phrase, feminine الجديدة agrees with سيارة “car.” In the second, masculine الجديد agrees with المدير “manager.” The written case endings make the relationship even clearer in fully vocalized Arabic. When gender and number do not distinguish the possible meanings, an unvocalized phrase may be ambiguous and may need rewording.

Meaning can affect human plural agreement

The beginner contrast “human plural = plural adjective; non-human plural = feminine singular adjective” is highly useful. At more advanced levels, you will see agreement shaped by whether a group is understood as rational human beings, by word order, and by style. Collective nouns can also behave differently from straightforward plurals. Learn such examples as complete phrases instead of forcing every collective word into the basic table.

Special adjective patterns

Not all adjectives make feminine and plural forms by attaching the most familiar endings. Colors and physical characteristics often use pairs such as أحمر / حمراء. Broken plurals—plural forms created by changing the internal word pattern—include جديد / جدد and ذكي / أذكياء. These are still agreement forms, but their shape must often be learned with the adjective.

Some adjectives ending in patterns such as أفعل also have special case behavior in formal Arabic. This belongs with advanced case and declension study; it does not change the central principle that the adjective follows the grammatical role of its noun.

Word order can change emphasis

The neutral order is noun followed by adjective. Literary or rhetorical Arabic can move a descriptive word or use it as a separate predicate for emphasis, but learners should not imitate marked word order until they can recognize the ordinary noun phrase confidently. In most practical situations, noun + matching adjective is the safest choice.

Practice Tips

1. Learn adjectives as pairs. Record جديد / جديدة, كبير / كبيرة, and ذكي / ذكية, then combine each pair with one masculine and one feminine noun. This builds agreement into your vocabulary from the start.
2. Run a four-step check. For every phrase, ask: Is the noun masculine or feminine? Singular, dual, or plural? Definite or indefinite? Does formal case need to be shown? Then inspect the adjective for the same features.
3. Contrast phrases with sentences. Say or write pairs such as البيت الكبير “the big house” and البيت كبير “the house is big.” This prevents one of the most common English-speaker mistakes and trains you to notice الـ immediately.

Related Concepts

• Prerequisite: Noun Gender — learn how masculine and feminine nouns control adjective forms.
• Next step: Nisba Adjectives — form adjectives such as مصري / مصرية “Egyptian” and apply the same agreement rules.
• Next step: Colors — practice special masculine and feminine pairs such as أحمر / حمراء.
• Later: Comparative and Superlative — compare people and things with forms such as أكبر “bigger/biggest.”