expression, godan verb (-su)
fix one's hair; straighten one's hair; adjust one's hair
Used when tidying or adjusting hair that has become messy, or when making a small correction to one's hairstyle. Often implies a quick fix rather than a full restyling.
風で乱れた髪を直す。
I fix my hair after it got messed up by the wind.
鏡を見ながら前髪を直した。
I adjusted my bangs while looking in the mirror.