Broken Plurals in Arabic

In Brief

Arabic broken plurals (جمع التكسير) are made by changing the internal shape of a noun: كتاب → كتب “book → books” and رجل → رجال “man → men.” The changes follow recurring patterns, but there is no single ending that lets you form every plural reliably, so learn each noun together with its plural. For agreement, the essential beginner rule is that a non-human plural is normally treated as feminine singular: الكتب الجديدة “the new books.”

Overview

A noun (a word for a person, place, thing, or idea) can form its plural in several ways in Arabic. A sound plural keeps the main shape of the singular and adds an ending, as in معلمة → معلمات “female teacher → female teachers.” A broken plural changes the structure inside the word instead. Sometimes vowels change, sometimes an extra consonant such as ا or و appears, and sometimes part of the singular form disappears: بيت → بيوت “house → houses,” قلم → أقلام “pen → pens,” and مدينة → مدن “city → cities.”

This is called “broken” because traditional Arabic grammar describes the singular word pattern as having been reshaped or “broken.” It does not mean that the plural is defective or carelessly irregular. Broken plurals belong to established patterns and are a central part of Standard Arabic. In fact, most Arabic nouns use a broken plural, including many words needed in everyday A2 reading and conversation.

English has a few internal-change plurals, such as man → men and tooth → teeth, but most English nouns simply add -s. An English-speaking learner may therefore expect one dependable Arabic plural ending. That expectation causes trouble: knowing كتاب does not by itself guarantee that you will produce كتب. The practical solution is to store a vocabulary item as a pair—كتاب، جمعه كتب “book; its plural is books”—rather than learning the singular alone.

How It Works

The word is fitted to a new pattern

Arabic vocabulary is often organized around a root, usually a set of consonants carrying a broad family of meanings. A pattern is the arrangement of vowels and additional letters around those consonants. In كتاب → كتب, the consonants ك-ت-ب remain, but the pattern changes. In بيت → بيوت, the plural has a longer internal shape. You do not need to analyze every root before using these words; recognizing repeated shapes is enough at first.

The following are common patterns, not a machine for generating guaranteed answers. The Arabic pattern in the middle is a model showing the shape of the plural.

Singular	Common plural pattern	Broken plural	Meaning
كتاب	فُعُل	كتب	book → books
بيت	فُعُول	بيوت	house → houses
قلم	أَفْعَال	أقلام	pen → pens
رجل	فِعَال	رجال	man → men
غرفة	فُعَل	غرف	room → rooms
سؤال	أَفْعِلَة	أسئلة	question → questions
مدرسة	مَفَاعِل	مدارس	school → schools
رسالة	فَعَائِل	رسائل	message/letter → messages/letters

These patterns are useful in three ways. They help you recognize that an unfamiliar form is probably plural, connect it to a known singular, and remember similar word pairs. They are less reliable as a way to guess a plural from scratch. Two singular nouns that look alike can select different patterns, while one noun can sometimes have more than one plural.

The plural must be learned with the singular

When recording a new noun, include its gender and plural:

• كتاب (مذكر)، كتب — book, masculine; books
• مدينة (مؤنث)، مدن — city, feminine; cities
• رجل (مذكر)، رجال — man, masculine; men
• رسالة (مؤنث)، رسائل — message or letter, feminine; messages or letters

A feminine singular ending in ة does not force a sound plural in ات. Some such nouns do take ات, but many have a broken plural: مدينة → مدن, غرفة → غرف, رسالة → رسائل. The final ة belongs to the singular and is absent from these broken plural forms.

Conversely, a masculine noun may have a broken plural rather than the masculine sound ending ون/ين: رجل → رجال and صديق → أصدقاء. The kind of plural is a property of the noun, not a free choice made from its gender alone.

Human and non-human agreement

Agreement means that related words change form to match a noun. Arabic makes an important distinction between plurals referring to humans and plurals referring to non-humans.

Beginner rule: non-human plurals take feminine singular agreement

A plural naming objects, animals, places, or abstract things normally combines with a feminine singular adjective, demonstrative, pronoun, and—in the usual Standard Arabic patterns—a feminine singular verb. The grammatical form is singular even though the English meaning is plural.

Non-human plural	Feminine singular agreement	Meaning
كتب	جديدة	new books
بيوت	كبيرة	big houses
مدن	جميلة	beautiful cities
أسئلة	صعبة	difficult questions
هذه الكتب	هذه	these books
وصلت الرسائل	وصلت	the messages arrived

This rule applies to non-human sound plurals too, so it is not caused by the plural being “broken.” It is a general feature of Arabic plural agreement. Still, broken plurals are where learners meet it constantly.

Human plurals take plural agreement

When the plural refers to people, adjectives and demonstratives normally use plural forms:

• رجال طوال — tall men
• نساء ماهرات — skilled women
• أصدقاء جدد — new friends
• هؤلاء الرجال — these men

Do not apply feminine singular agreement merely because the noun has a broken plural. The key question is whether the noun refers to humans: compare هذه الكتب الجديدة “these new books” with هؤلاء الأصدقاء الجدد “these new friends.”

Definiteness works normally

A broken plural can be indefinite or definite just like a singular noun. Add الـ to make it definite:

• كتب — books / some books
• الكتب — the books
• بيوت كبيرة — big houses
• البيوت الكبيرة — the big houses

The adjective matches definiteness as well as the agreement form. Therefore الكتب جديدة means “the books are new,” where جديدة is the predicate (the information stated about the books). By contrast, الكتب الجديدة means “the new books,” where the adjective is part of the noun phrase and also has الـ.

Broken plurals are still ordinary nouns

Once you know the form, use it wherever a noun can appear. It can take الـ, follow a preposition, be the first or second part of a possession phrase, or receive a possessive ending:

• في البيوت — in the houses
• أبواب البيوت — the doors of the houses
• كتبهم — their books
• رسائل الأصدقاء — the friends’ messages

The unusual part is chiefly the change from singular to plural. The plural itself participates in normal Arabic noun grammar.

Examples in Context

Arabic	English	Note
اشتريت كتابًا جديدًا.	I bought a new book.	Singular: كتاب
اشتريت كتبًا جديدة.	I bought new books.	كتب is non-human, so جديدة is feminine singular.
هذا البيت صغير.	This house is small.	Singular demonstrative and adjective
هذه البيوت صغيرة.	These houses are small.	هذه and صغيرة are feminine singular in form.
يعيش رجال كثيرون في هذه القرية.	Many men live in this village.	Human رجال takes a plural adjective.
هؤلاء الرجال أطباء.	These men are doctors.	هؤلاء is used for human plurals.
زرت مدنًا جميلة في المغرب.	I visited beautiful cities in Morocco.	مدينة → مدن; non-human agreement
المدارس قريبة من البيوت.	The schools are close to the houses.	Both broken plurals are non-human.
عندي ثلاثة أقلام زرقاء.	I have three blue pens.	قلم → أقلام
قرأنا رسائل قصيرة.	We read short messages.	رسالة → رسائل
هذه الأسئلة صعبة، لكن الأجوبة واضحة.	These questions are difficult, but the answers are clear.	Two non-human broken plurals
عاد الأصدقاء الجدد إلى الفندق.	The new friends returned to the hotel.	Human أصدقاء takes plural الجدد.
فتحت المرأة أبواب الغرف.	The woman opened the doors of the rooms.	باب → أبواب and غرفة → غرف
وصلت الكتب هذا الصباح.	The books arrived this morning.	The verb is feminine singular with a non-human plural.

Common Mistakes

Adding an ending to every noun

• Wrong: كتابُون for “books”
• Right: كتب
• Why: كتاب has a broken plural. The masculine sound plural ending ون cannot be attached freely to every masculine noun.

Treating every noun ending in ة as an ـات plural

• Wrong: مدينات for the normal plural of مدينة
• Right: مدن
• Why: The ending ة identifies many feminine singular nouns, but it does not predict their plural with certainty. Learn مدينة → مدن as a pair.

Using plural adjectives with non-human plurals

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

Using feminine singular agreement for human plurals

• Wrong: الأصدقاء الجديدة
• Right: الأصدقاء الجدد
• Why: أصدقاء refers to people, so its adjective is plural. “Broken plural” describes how the noun is formed; it does not make every agreeing word feminine singular.

Guessing from a familiar pattern and not checking

• Wrong: assuming that any plausible patterned form must be the accepted plural
• Right: check a dictionary and record the listed plural with the singular
• Why: Patterns narrow the possibilities, but lexical convention decides which plural a noun uses. A form can sound structurally possible and still not be the usual word.

Confusing a noun phrase with a full statement

• Wrong for “the new books”: الكتب جديدة
• Right: الكتب الجديدة
• Why: In الكتب الجديدة, both words are definite and form one phrase, “the new books.” الكتب جديدة is a complete nominal sentence: “The books are new.”

Usage Notes

Broken plurals occur throughout Modern Standard Arabic, from news reports and formal writing to ordinary conversation. Spoken varieties also use them extensively, although pronunciation and sometimes the preferred plural can differ by region. Learning the Standard Arabic form gives you the best base for reading; when studying a dialect, note its common spoken form separately rather than assuming that every Standard Arabic pair is pronounced identically.

Short vowels are usually not written in everyday Arabic. As a result, a plural pattern that looks clear in a fully vocalized textbook may be less obvious on a normal page. For example, كُتُب is usually printed simply as كتب. Reading the whole sentence—and already knowing the singular/plural pair—helps you identify the form.

Plural frequency also depends on meaning. Some nouns have two accepted plurals, and the choice may distinguish senses or established expressions. A useful example is بيت: بيوت normally means houses or homes, while أبيات is used for lines or verses of poetry. This is another reason to learn plurals in context, not merely as shapes in a chart.

Beyond the Basics: Advanced Use

You do not need to master the details in this section at A2, but they explain forms you will meet in careful Standard Arabic.

Some plural patterns affect case endings

Case is the change at the end of an Arabic noun according to its job in the sentence. Certain broken-plural shapes, especially forms such as مساجد “mosques,” مدارس “schools,” and مفاتيح “keys,” belong to a group traditionally called صيغة منتهى الجموع. These forms are usually diptotes (ممنوع من الصرف): when indefinite, they do not take tanwin and normally use fatḥa rather than kasra in the genitive.

• في مساجدَ كثيرةٍ — in many mosques
• في المساجدِ الكبيرةِ — in the large mosques
• في مساجدِ المدينةِ — in the city’s mosques

The regular kasra returns when the noun has الـ or is the first term of an iḍāfa (a possession or specification phrase), as in the last two examples. This spelling and case behavior belongs to more advanced reading and writing; it does not change the basic meaning or agreement rule.

Verb agreement also depends on word order

With human plurals, formal Standard Arabic often uses a singular verb when the verb comes before an explicit plural subject, but a plural verb when the subject comes first:

• وصل الرجال — the men arrived
• الرجال وصلوا — the men arrived

This is a wider rule of Arabic sentence structure, not a special property of broken plurals. With non-human plurals, feminine singular agreement remains the central pattern: وصلت الرسائل “the messages arrived.”

Number phrases have their own rules

After numbers, the required noun form depends on the number. For example, three through ten normally use a plural noun, as in ثلاثة كتب “three books,” while other numbers may require a singular form or a different case pattern. Learn the broken plural now, but treat Arabic number agreement as a separate topic rather than trying to derive all of it from the basic plural rule.

Meaning can choose the plural

When a noun has several plurals, they are not always freely interchangeable. A dictionary may label one form literary, rare, regional, or tied to a particular meaning. For active vocabulary, prioritize the plural found in your course or in frequent contemporary examples. For reading, learn to recognize alternatives without forcing yourself to use all of them.

Practice Tips

1. Make two-sided noun cards. Put the singular and meaning on one side, then require the plural in your answer: قلم — pen → أقلام. On the reverse, ask yourself for the singular too. Include a short phrase such as أقلام جديدة so that agreement becomes automatic.
2. Sort by both pattern and meaning. Group أقلام، أبواب، أولاد as one visible shape, but mark each item as human or non-human. Pattern grouping trains recognition; the human/non-human label trains agreement.
3. Transform complete sentences. Change هذا بيت كبير into هذه بيوت كبيرة, or هذا صديق جديد into هؤلاء أصدقاء جدد. Saying the whole sentence prevents you from learning the noun plural while forgetting the words that must agree with it.

Related Concepts

• Prerequisite: Sound Plurals — compare ending-based plurals with the internal changes used by broken plurals.