blush
verb intransitiveTo redden in the cheeks or face; to be suddenly suffused with a red color in the cheeks or face, from a sense of guilt, shame, confusion, modesty, diffidence or surprise; followed by at or for, before the cause of blushing; as, blush at your vices; blush for your degraded country. In the presence of the shameless and unblushing, the young offender is ashamed to blush.