Nouns

A noun in Arabic is more than a thing. It is a thing in a state — definite or not, masculine or feminine, one or two or many.

An Arabic noun, like an English noun, names something: a person, a place, a thing, an idea. But every Arabic noun also carries three properties at once — definiteness, gender, and number — and unlike English, all three are visible in the form of the word and in everything that agrees with it. Once you can read those three things off a noun automatically, the rest of the grammar opens up.

The categories of nouns

Arabic grammarians group nouns by the patterns they fit. A few categories come up so often that recognising them by shape pays for itself many times over:

Not every noun fits one of these named categories — there are countless ordinary nouns like bayt (house) or shams (sun) — but a striking proportion of Arabic vocabulary does, and the categories let you guess function from form. See roots and patterns for the full picture.

Definiteness

Arabic distinguishes the book from a book the same way English does, but with one form rather than two. The article الـ (al-) is prefixed to make a noun definite. Indefiniteness is shown by absence of al-, and in fully vocalized texts by a final -n sound called tanwiin.

A noun can also become definite by being possessed (kitaabii "my book," kitaab al-walad "the boy's book"). Full coverage on definiteness and the article ال.

Gender

Every Arabic noun is masculine or feminine. There is no neuter. Most feminine nouns end in ة (taa marbuuTa), pronounced -a. Many feminine nouns refer to things English would call neuter — shams (sun) is feminine; qamar (moon) is masculine. Verbs and adjectives must agree with the noun's gender. Full coverage on gender.

Number — and the dual

Arabic distinguishes three numbers: singular, dual, and plural. The dual is a separate grammatical form for exactly two of something. English has no such category — we say "two books" with the same plural books we use for three or three thousand. Arabic has a dedicated suffix -aan (or -ayn in non-nominative cases):

Plurals are a topic in their own right because Arabic has two systems running in parallel: sound plurals (regular suffixes) and broken plurals (the word reshapes from the inside). See plurals — the sound and the broken.

What about case?

In fully vocalized Modern Standard Arabic, nouns also carry case endings — short final vowels marking subject, object, and possessor. In ordinary written Arabic these endings are usually omitted, and in spoken dialect they are gone entirely. But they exist, they matter for formal writing and Quranic recitation, and they shape some everyday phrases. See cases.

Why English speakers find this hard

Three things tend to surprise English speakers. First, the dual: a separate grammatical category for "two" feels like an extra channel you didn't know existed. Second, the unpredictability of broken plurals: most common nouns take an irregular plural that has to be learned with the word. Third, the agreement rule for non-human plurals — a plural inanimate noun is treated grammatically as feminine singular, so "the books are good" agrees as if it were "the book is good (feminine)." This last rule is consistent and absolute, and it never stops feeling slightly wrong to an English speaker.

Twelve nouns to recognize

What it's called in the Arabic tradition

The general word for noun is اِسْم (ism), which classical grammarians use for everything that is not a verb (fiʿl) or a particle (Harf). The category covers nouns, adjectives, and pronouns — what English-speaking linguists would split out separately. So when an Arab grammarian says ism, they mean something a little broader than the English "noun."