modified
embarrassed, shamed, chagrined, humiliated, mortified, abashed, discomfited, regretful, contrite, rueful, repentant, penitent, apologetic, demeaned, crestfallen, conscience-stricken, uncomfortable,
discomforted, hesitant, perplexed, bewildered, shamefaced,
sheepish, dashed, bowed down, disconcerted, sputtering, stammering,
stuttering, gasping, floundering, rattled, muddled, confused,
nonplused, blushing, flustered, self-conscious, meek, red-faced, hangdog, feeling like a jackass*, taken
down a peg*, out of countenance*,
looking silly or foolish*, at a loss, unable to show one's face*, with egg on one's face*.
Antonyms proud*, smug, brazen.
ashamed implies embarrassment, and sometimes guilt, felt because of one's own or another's wrong or foolish behavior ashamed of his tears; humiliated implies a sense of being humbled or disgraced humiliated by my failure; mortified suggests humiliation so great as to seem almost fatal to one's pride or self-esteem she was mortified by his rude behavior in front of her family; chagrined suggests embarrassment coupled usually with regret over what might have been prevented chagrined at her error