깎다

To remove the surface of something or the skin of a fruit, etc., with a tool such as a knife.

To make grass, hair, etc. short by cutting it.

To make something in some shape by cutting or trimming a hard material.

To decrease the price, amount, degree, etc. of something.

To damage someone's reputation or good name.

깎은 밤 같다

For a young man to be dressed in a decent, neat and tidy manner.