Arabic Sound Plurals: Masculine and Feminine

Mastering plurals is a critical step in becoming proficient in Arabic, as it unlocks your ability to describe groups, generalize concepts, and engage in more complex conversation. Unlike English, which often just adds an "-s," Arabic employs two main plural systems: the irregular broken plural (which changes the word's internal structure) and the regular sound plural (which adds a predictable suffix). This article focuses exclusively on the sound plural system—your reliable, rule-based toolkit for forming plurals for a specific and large class of nouns and adjectives. Understanding the distinction between the masculine sound plural (with its case-sensitive endings) and the feminine sound plural (with its single, powerful suffix) is fundamental to building grammatically correct sentences.

The Foundation: Sound vs. Broken Plurals

Before diving into the rules, you must grasp the core distinction between the two plural systems in Arabic. A broken plural is formed by changing the pattern of consonants and vowels within the singular noun itself. For example, kitāb (book) becomes kutub (books). These patterns must often be memorized, as they can vary. In contrast, a sound plural is formed by attaching a suffix to the end of the singular noun without altering its core structure. Think of it as adding "-s" or "-es" in English. This article focuses on the two types of sound plural: the sound masculine plural (جَمْعُ المُذَكَّرِ السَّالِمِ) and the sound feminine plural (جَمْعُ المُؤَنَّثِ السَّالِمِ). The term "sound" (sālim) implies "safe" or "intact," meaning the singular noun remains unharmed.

The Sound Masculine Plural: -uuna and -iina Endings

The sound masculine plural is used for a specific category of nouns: primarily rational male beings. This includes words for professions, nationalities, and descriptors of men, such as muhandis (engineer), mu‘allim (teacher), or muslim (Muslim). It is also used for some non-human nouns that are treated as masculine plurals in Arabic grammar, like ‘ālam (world) which becomes ‘ālamūn (worlds).

To form it, you drop the tanwīn (the indefinite "-n" sound) from the singular and add one of two suffixes, which change based on grammatical case:

• Nominative Case (المرفوع): Add -ūna (ـونَ). This case is used for the subject of a sentence (the doer).
• Example: Al-mu‘allim-ūna (The teachers are present).
• Accusative/Genitive Cases (المنصوب/المجرور): Add -īna (ـينَ). This case is used for the object of a verb or after a preposition.
• Accusative Example: Ra’aytu al-mu‘allim-īna (I saw the teachers).
• Genitive Example: Dhahabtu ma‘a al-mu‘allim-īna (I went with the teachers).

The vowel before the suffix is always a long -ū- or -ī-. A key point is that the sound masculine plural cannot be used for non-rational beings (animals, objects) or for feminine nouns. Trying to say "books" as kitābūna would be incorrect; "books" uses a broken plural (kutub).

The Sound Feminine Plural: The Universal -aat Ending

The sound feminine plural is both more common and more flexible in its application than its masculine counterpart. It is formed by adding the suffix -āt (ـات) to the end of the singular feminine noun. Crucially, you must first ensure the singular noun is in its feminine form, typically ending with the feminine tā’ marbūṭah (ة), which is pronounced as "-ah" or "-at" in pause.

The process is straightforward:

1. Start with the singular feminine noun: mudarrisah (teacher, f.).
2. Add -āt: mudarris-āt.
3. The case endings (ḍammah, fatḥah, kasrah) are placed on the tā’ of the suffix.

• Nominative: al-mudarris-ātu
• Accusative: al-mudarris-āti
• Genitive: al-mudarris-āti

Unlike the masculine version, the -āt suffix is used for a much broader range of nouns. It applies to:

• All rational feminine beings: Ṭālibah (student, f.) → Ṭālibāt.
• Many non-rational beings (animals, objects) that are grammatically feminine: Sayyārah (car) → Sayyārāt.
• Many nouns that are grammatically feminine even without a visible "tā’ marbūṭah": ‘Ām (year) → A‘wām (broken plural is more common, but ‘Āmāt is possible).
• Broken plural nouns that refer to feminine collectives can also take the sound feminine plural for emphasis.

This makes the -āt plural a powerful and frequently used tool in your Arabic toolkit.

Adjective Agreement with Sound Plurals

One of the most important applications of understanding sound plurals is achieving correct adjective agreement. The rule is clear but often tricky for learners: Adjectives must agree with the nouns they describe in gender, number, definiteness, and case.

When describing a noun in the sound masculine plural, the adjective must also be put into the sound masculine plural form.

• Example: Al-mu‘allim-ūna al-misriyy-ūna (The Egyptian teachers). Both the noun and adjective take the -ūna suffix in the nominative case.

However, there is a critical exception for non-human plurals. In Arabic, any plural noun referring to non-human or non-rational beings is treated as grammatically feminine singular. This means that if you have a sound feminine plural noun for objects (e.g., sayyārāt, cars), any adjective describing it must be in the feminine singular form.

• Correct: Al-sayyār-ātu al-jadīd-atu (The new cars). Notice jadīdatu is feminine singular.
• Incorrect: Al-sayyār-ātu al-jadīd-ātu. This would imply the cars are rational feminine beings.

This rule is a major point of grammar that distinguishes proficient speakers. Always ask: Is the plural noun referring to humans (specifically males for sound masc. plural)? If yes, the adjective agrees in the plural. If it refers to objects, animals, or concepts, the adjective defaults to feminine singular.

Common Pitfalls

1. Using the Sound Masculine Plural for Non-Human Nouns: This is a categorical error. You cannot use -ūna/-īna for things like "tables" or "ideas." For these, you must use either a broken plural or, if applicable, the sound feminine plural -āt.

• Incorrect: qawā‘idūna (for "rules").
• Correct: qawā‘id (broken plural) or less commonly, qā‘idāt.

1. Mishandling Adjective Agreement with Non-Human Plurals: Forgetting that a pile of objects is treated as a single feminine entity is the most common mistake.

• Incorrect: Al-kutubu al-jadīdūna (treating "books" as human male plural).
• Correct: Al-kutubu al-jadīdatu (treating "books" as feminine singular, using the broken plural kutub).

1. Applying the Wrong Case Ending for Masculine Plurals: Confusing the nominative -ūna with the accusative/genitive -īna will mark you as a beginner. Remember the function: subject = -ūna; object or after preposition = -īna.

• Incorrect: Salāmu ‘alā al-muslimūna (Peace be upon the Muslims). Here, "upon" is a preposition, requiring the genitive case.
• Correct: Salāmu ‘alā al-muslimīna.

1. Forgetting to Remove the Tanwīn: When forming the sound masculine plural, you must first drop the indefinite "-n" from the singular.

• Incorrect: muhandisun → muhandisunūna.
• Correct: muhandisun → muhandis + ūna = muhandisūna.

Summary

• Arabic sound plurals are formed by adding suffixes (-ūna/-īna or -āt) without changing the internal structure of the singular word, providing a predictable method for pluralization.
• The sound masculine plural (using -uuna or -iina) is primarily restricted to rational male beings, and its ending changes based on grammatical case (nominative vs. accusative/genitive).
• The sound feminine plural (using the -aat ending) is applied more broadly to feminine nouns and many grammatically feminine non-human nouns, making it an extremely common and useful plural form.
• Adjective agreement is paramount: adjectives must match the noun's plural form and case, with the critical exception that all non-human plurals—regardless of their form—require a feminine singular adjective.
• Avoid the classic pitfalls of misapplying the masculine plural to objects, using the wrong case ending, or incorrectly pairing adjectives with non-human plural nouns.