This is the 528th most frequent Turkish word.
gerçek
"Gerçek" means "real" or "truth" in English.
Here, 'gerçek' is used as a noun meaning 'reality'.
Gerçek çok acı olabilir.
Reality can be very painful.
In this sentence, 'gerçek' is an adjective meaning 'true'.
Söyledikleri gerçek mi?
Is what they said true?
Here, 'gerçek' is used in the expression 'gerçek şu ki' meaning 'the truth is', forming a set phrase.