This is the 182nd most frequent Turkish word.
çünkü
"Çünkü" means "because" in English.
Here, 'çünkü' is used to provide a reason for the main action.
Dersime çalışıyorum çünkü sınavda başarılı olmak istiyorum.
I am studying for my lesson because I want to succeed in the exam.
In this sentence, 'çünkü' is connecting the two clauses to explain the cause of the first action.
O dışarı çıkmıyor çünkü yağmur yağıyor.
He/She is not going outside because it is raining.
Here, 'çünkü' indicates the motivation behind the subject's desire to learn.