This is the 9272nd most frequent Turkish word.
yakası
"Yakası" means "its collar" in English.
The word 'yakası' is used here to refer to the 'collar' of a piece of clothing, specifically as the word 'yaka' (collar) inflected with the possessive suffix for 'my'.
Elbisemin yakası kirlendi, hemen temizlemem lazım.
The collar of my dress got dirty; I need to clean it immediately.
The word 'yakası' is used here to denote 'side' as part of a directional region, specifically referring to the 'northern side'.
Kuzeyin yakası, güneyden daha soğuktur.
The northern side is colder than the southern.
Here 'yakası' contributes to the idiom 'işin yakası bağlanmıyor,' which means 'matters cannot be resolved,' using 'yaka' metaphorically to imply issues being 'collar-tied' or handled.