This is the 443rd most frequent Turkish word.
yalnız
"Yalnız" means "alone" or "lonely" in English.
Here, 'yalnız' is used as an adjective meaning 'alone'.
Yalnız sesleri dikkatlice dinle.
Listen to the sounds carefully alone.
In this sentence, 'yalnız' is used as a conjunction meaning 'but' or 'however'.
Bu kitap çok güzel, yalnız biraz uzun.
This book is very good, but it's a bit long.
Here, 'yalnız' functions as an adjective meaning 'alone' in the sense of solitude.