This is the 7863rd most frequent Turkish word.
kemikleri
"Bones."
'Kemikleri' means 'his/her bones' here; it is the plural of 'kemik' with the possessive ending '-leri'.
Eskiden bu sıcak havalarda kemikleri ağrıyordu.
In the past, during this hot weather, his bones used to ache.
'Kemikleri' refers to '(the cat's) bones,' indicating plural of 'kemik' with possessive marking the subject's bones.
Kedinin kemikleri çok hassastır, dikkat etmeliyiz.
The cat's bones are very fragile; we must be careful.
'Kemikleri' indicates 'his/her bones,' with the plural form and the possessive suffix showing ownership or association.