sinirin
Sinirin is a Turkish term formed by adding the second-person singular possessive suffix -in to the noun sinir, which means nerve. In Turkish, possessive relationships are expressed directly on the noun with suffixes, so sinirin translates roughly to “your nerve.” It functions as a grammatical form rather than a standalone lexical item.
The base noun sinir carries two related senses: an anatomical nerve and, figuratively, nerve, courage, or temperament.
Turkish is an agglutinative language, and sinirin is one example of how suffixes encode relationships in a