a·venge / əˈvenj/ • v. [tr.] inflict harm in return for (an injury or wrong done to oneself or another): his determination to avenge the murder of his brother. ∎  inflict such harm on behalf of (oneself or someone else previously wronged or harmed): we must avenge our dead she avenged herself after he broke off their engagement the warrior swore he would be avenged on their prince.DERIVATIVES: a·veng·er n.

avenge XIV. f. A-1 + OF. vengier :- L. vindicāre VINDICATE.