This is the 1547th most frequent Turkish word.
isteği
The Turkish word "isteği" means "his/her/its request" or "his/her/its desire."
Here, "isteği" refers to someone's desire or demand, which is fulfilled by the speaker, used possessively as 'their request'.
Ben onun isteğini yerine getirdim.
I fulfilled their request.
In this sentence, "isteği" represents an internal feeling or urge towards an action, translated as 'the desire'.
Bu kitabı okuma isteği duydum.
I felt the desire to read this book.
Here, "isteği" indicates a collective or general willingness or inclination towards something, used as 'the willingness'.