Arabic plurals fall into two broad categories. Sound plurals (الجمع السالم) attach a suffix to the singular without changing the root. Broken plurals (جمع التكسير) rearrange the internal vowels and sometimes the consonants of the root entirely, so the singular form seems to break apart and reassemble in a new shape. There are dozens of broken plural patterns, but a handful of them cover the vast majority of the vocabulary you encounter every day.
Why Broken Plurals Are Not Random
Despite feeling unpredictable, broken plurals follow patterns tied to the shape of the singular. Once you recognise the singular pattern, you can usually predict the plural. The key is learning the singular-to-plural mapping as a template, not as individual word pairs.
The Most Important Patterns
Pattern 1: فَعْل → أَفْعَال (the most common)
Three-letter nouns with a short vowel between the first and second root consonants most often form their plural this way.
| Singular | Plural | Meaning |
|---|---|---|
| بَاب | أبواب | doors |
| يَوْم | أيام | days |
| سَهْم | أسهم | arrows / shares |
| حَال | أحوال | states / conditions |
Pattern 2: فَعِيل → فُعَلَاء (for living beings, qualities)
| Singular | Plural | Meaning |
|---|---|---|
| كَرِيم | كُرَمَاء | generous people |
| حَكِيم | حُكَمَاء | wise people |
| شَرِيك | شُرَكَاء | partners |
Pattern 3: فَعِيل → فُعُل (for inanimate objects)
| Singular | Plural | Meaning |
|---|---|---|
| طَرِيق | طُرُق | roads |
| كِتَاب | كُتُب | books |
| رَقَبَة | رِقَاب | necks |
Pattern 4: فَاعِل → فُعَّال / فَعَلَة (for professions and active agents)
| Singular | Plural | Meaning |
|---|---|---|
| كَاتِب | كُتَّاب | writers |
| طَالِب | طُلَّاب / طَلَبَة | students |
| صَانِع | صُنَّاع | makers / craftsmen |
Pattern 5: فَعْلَة → فِعَال / فُعَل (for feminine nouns)
| Singular | Plural | Meaning |
|---|---|---|
| مَدِينَة | مُدُن | cities |
| دَوْلَة | دُوَل | states / countries |
| قِصَّة | قِصَص | stories |
Nouns with Two Valid Broken Plurals
Some nouns have two broken plural forms that differ in meaning or register. This is not an error, it is a feature of Arabic's richness.
| Singular | Plural 1 | Plural 2 | Difference |
|---|---|---|---|
| بَيْت | بُيُوت | أبيات | بيوت = houses / أبيات = verses of poetry |
| عَيْن | عُيُون | أعيان | عيون = eyes, springs / أعيان = notables |
| رَأْس | رُؤُوس | أرؤُس | Both mean heads, رؤوس is more common |
When to Use a Sound Plural Instead
Not every noun has a broken plural. Use the sound masculine plural (ـون/ـين) for male rational beings and modern coined words. Use the sound feminine plural (ـات) for most feminine nouns, verbal nouns (مصادر), and foreign loanwords. When in doubt and no broken plural comes to mind, the feminine sound plural is usually acceptable.
Broken Plurals and Adjective Agreement
This is a trap that catches many writers. Non-rational broken plurals (things, not people) are treated grammatically as feminine singular when they serve as the antecedent of an adjective or verb. This is the non-rational plural rule covered in more detail in our guide to masculine and feminine in Arabic.
| ❌ Wrong | ✅ Correct | Reason |
|---|---|---|
| الكتبُ الجديدُون | الكتبُ الجديدةُ | Non-rational plural → fem. sing. adjective |
| الأبوابُ مفتوحون | الأبوابُ مفتوحةٌ | Same rule |
| كتبتِ الكتبُ | كُتِبَتِ الكتبُ (passive) / كانت الكتبُ | Verb also takes feminine singular |
Frequently Asked Questions
Do all Arabic nouns have broken plurals?
No. Many nouns use sound plurals. But a large core of Arabic vocabulary, especially three-letter nouns and adjectives, uses broken plurals that must be memorised individually.
Can a noun have both a broken plural and a sound plural?
Yes, and the two forms often carry different meanings or registers. When two plurals exist, a dictionary or a trustworthy corpus is the safest guide.