This is the 9319th most frequent Turkish word.
yen
"Yen" in Turkish means "sleeve" (part of clothing).
Here, 'yen' is derived from 'yeni', meaning 'new', describing the book as recently published or acquired.
Bu yen kitabı okuyabileceğim.
I will be able to read this new book.
In this sentence, 'yensiz' incorporates 'yen', expressing a state derived from an outdated informal usage implying exhaustion or irritation.
Bugün çok yensiz hissediyorum.
Today, I feel very irritable.
The word 'yen' is part of 'yen oyununda', describing the game as new or just introduced.