Mektubun

Mektubun is a Turkish word that functions as the second-person singular possessive form of mektup, meaning "your letter." In this construction, the stem mektup combines with the possessive suffix -un, and due to Turkish consonant harmony the final p typically becomes b before the suffix, resulting in mektubun. The form is used to indicate ownership of a letter by the person being addressed.

Etymology and meaning trace the term to the word mektup, itself borrowed from Arabic maktūb meaning "written" or "something that is written." In Ottoman Turkish and modern Turkish, mektup broadly covers epistolary writing, correspondence, and, more formally, a letter or document. The possessive form mektubun is one of several related forms derived from mektup, such as mektubum (my letter) and mektubunuz (your letter, formal or plural).

Usage and grammar: Mektubun is used in sentences to attribute the letter to the addressee. Examples include "Mektubun nerede?" (Where is your letter?) and "Mektubun içeriğini gördüm." (I saw the contents of your letter.) The word participates in Turkish possessive and case systems, with other forms like mektubumu (my letter as object) and mektubunu (your letter as object), illustrating how possession and syntax change with suffixes.

See also: mektup, which refers to a general letter or epistolary communication; maktūb, the original Arabic root meaning "written."