This is the 946th most frequent Turkish word.
küçük
Small.
Here, 'küçük' is used as an adjective to describe the size of the box.
Bu küçük kutunun içinde bir hediye var.
There is a gift inside this small box.
Here, 'küçük' describes the age at which the person started learning music, implying it was during childhood.
Küçük yaşta müzik öğrenmeye başladı.
He/she started learning music at a young age.
In this sentence, 'küçük' is used to describe the size of the hill relative to other hills or landforms.