ashamedHe was ashamed that he had been caught stealing.
embarrassedI was too embarrassed to admit I was wrong.
abashedShe looked at the floor, abashed.
sheepishShe startled, then gave him a sheepish smile as she picked up her dropped papers.
mortifiedShe'd be mortified if she knew she'd upset her family.
guiltyI feel so guilty about forgetting her birthday.
humiliatedFeeling betrayed and humiliated, she considered quitting her job.