(n.) Easily confused or put out of countenance; diffident; bashful; modest.

abashed ashamed bashful blushing chagrined chapfallen chastened confused conscience-smitten conscience-stricken conscious coy crestfallen crushed demure diffident discomfited embarrassed full of remorse hangdog humbled humiliated inarticulate meek modest mortified mousy out of countenance red-faced regretful remorseful repining rueful self-accusing self-condemning self-conscious self-convicting self-debasing self-effacing self-flagellating self-humiliating self-punishing self-reproaching shamed shamefast shameful sheepish shy skittish sorry stammering timid timorous uncomfortable unhappy about wistful