This is the 12373rd most frequent Turkish word.
hazırlamayı
"Preparing" or "to prepare."
Here, 'hazırlamayı' is used as an object of the verb 'unuttum' (I forgot), specifically referring to the act of preparing homework.
Ödevimi hazırlamayı unuttum.
I forgot to prepare my homework.
In this sentence, 'hazırlamayı' is the focus of the verb 'düşünüyorum' (I am considering), referring to the act of creating a presentation.
Bir sunum hazırlamayı düşünüyorum.
I am considering preparing a presentation.
In this sentence, 'hazırlamayı' is a noun form derived from the verb 'hazırlamak' (to prepare), modified to indicate the act of preparing food as an object of the verb 'seviyorum' (I like/love).