v. 1 intr. repay an injury, insult, etc., in kind; attack in return; make reprisals. 2 tr. a (usu. foll. by upon) cast (an accusation) back upon a person. b repay (an injury or insult) in kind. retaliation n. retaliative adj. retaliator n. retaliatory adj.
[ L retaliare (as RE-, talis such) ]