This is the 722nd most frequent Turkish word.
derin
Deep.
In this sentence, 'derin' describes the physical depth of the lake.
Bu göl çok derin.
This lake is very deep.
Here, 'derin' conveys the metaphorical depth of his thoughts, signifying profound or intense thinking.
Derin düşünceler içinde kaybolmuştu.
He was lost in deep thoughts.
In this instance, 'derin' is used to describe the low pitch and resonance of the voice.