BETRAY

v. 1 be or prove false or disloyal to, sell out, break faith with, let down, fail, inform on, Colloq sell down the river, Slang Brit shop He betrayed her to the enemy 2 reveal, disclose, divulge, impart, tell; expose, lay bare She betrayed their hide-out to the police He betrayed an unsuspected streak of cowardice. 3 lead astray, mislead, misguide, deceive, dupe, fool, hoodwink He has been betrayed by his own arrogance