(a.) Affected by shame; abashed or confused by guilt, or a conviction or consciousness of some wrong action or impropriety.

abashed abject blushing chagrined chapfallen conscience-smitten conscience-stricken contrite crestfallen crushed discomfited embarrassed full of remorse hangdog humbled humiliated mean mortified out of countenance penitent red-faced regretful remorseful repentant repining rueful self-accusing self-condemning self-convicting self-debasing self-flagellating self-humiliating self-punishing self-reproaching shamed shamefaced shamefast shameful sheepish sorry unhappy about wistful