Üçüncüsü

Üçüncüsü is a Turkish pronoun meaning “the third (one)” and is used to refer to the third item in a previously mentioned sequence. It functions as a nominal form of the ordinal üç�ncü (the third) with the third-person possessive suffix -sü, turning the adjective into a stand‑alone reference to an item in a list. In usage, üç�ncüsi̇ is common in enumerations such as birinci, ikinci, üçüncüsü, where it marks the final or third element.

Etymology and form: the word derives from üç (three) plus the ordinal suffix -üncü to form üç�ncü (the third). The possessive/derivative suffix -sü attaches to create a pronoun-like form that can stand in for “the third one.” In everyday Turkish, birinci (first), ikinci (second), and üçüncüsü (the third) appear as parallel forms, with üçüncüsü commonly used when referencing a specific third item rather than merely describing it as third.

Usage notes: Üçüncüsü appears in declarative, explanatory, or comparative passages. It can serve as subject or object depending on sentence structure, and it often appears in lists: “Birinci, ikinci ve üçüncüsü…” or in sentences like “Üçüncüsü, plan değişti,” or “Üçüncüsünü al.” The form is typically lower-case within a sentence, capitalized only if it begins a sentence.

See also: birinci, ikincisi, dördüncü, ordinal numerals in Turkish. The family of forms is used to sequence items and to refer to specific positions within a set.