na-adjective
looking apologetic; seeming sorry
Describes a person's appearance or manner that suggests they feel apologetic or regretful. Often used when someone looks like they want to apologize but hasn't yet, or when their expression conveys remorse.
See also: 申し訳ない
彼は申し訳なさそうに頭を下げた。
He bowed his head apologetically.
遅刻した生徒は申し訳なさそうな顔で教室に入ってきた。
The late student entered the classroom with an apologetic look.