This is the 3572nd most frequent Turkish word.
seviyesini
The Turkish word "seviyesini" translates to "its level" or "the level of it" in English.
Here, 'seviyesini' refers to the 'level' of difficulty associated with the book, acting as the object of the verb 'bulmak'.
Kitabın zorluk seviyesini yüksek buldum.
I found the difficulty level of the book to be high.
In this sentence, 'seviyesini' indicates the 'level' of filling in the water tank and serves as the object of the verb 'kontrol etmek'.
Su deposunun doluluk seviyesini kontrol ettim.
I checked the water tank's filling level.
Here, 'seviyesini' represents the 'level' of performance and acts as the object of the verb 'yükseltmek'.