This is the 16208th most frequent Turkish word.
yakasında
"Yakasında" means "on its/her/his collar" in English.
In this sentence, 'yakasında' is used locatively to refer to the specific position of something on the collar (yaka) of the coat.
Adamın paltosunun yakasında çiçek vardı.
There was a flower on the collar of the man's coat.
Here, 'yakasında' describes the location of the cat in a possessive construction, emphasizing it sleeping on its owner's collar.
Kedi sahibinin yakasında uyuyordu.
The cat was sleeping on the collar of its owner.
In this case, 'yakasında' is metaphorically used to express being close or near someone, here indicating an aversion to physical or personal closeness.