Onun

Onun is a Turkish word that functions as a third-person singular possessive determiner and pronoun. It translates roughly as "his," "her," or "its," depending on the possessed noun. Turkish has no grammatical gender on nouns, so the gender of the possessor is not encoded in onun; the referent is identified by context.

As a determiner, onun precedes a noun to mark possession, for example: onun arabası (his/her car), onun evi (his/her house), onun kitapı (his/her book). The noun may also take its own possessive suffix, as in arabası, evi, kitabı, with onun supplying the third-person possessor information.

As a free-standing pronoun, onun can refer to the possessor without repeating a noun, as in Bu kitap onun. meaning "This book is his/hers." In this use, the exact person or entity is inferred from context. For plural possessors, the form is onların, as in onların arabaları (their cars) or onların evi (their house).

In summary, onun is the standard Turkish third-person singular possessive determiner and pronoun, used with nouns to indicate possession or, in its standalone form, to indicate that the possessor is known from context. Its gender-neutral nature aligns with Turkish grammar, where possessors are not marked for gender on the noun.