Antonym: abstain, pardon. Similar words: scavenge, vengeance, engender, challenge, passenger, challenged, svengali, haven. Meaning: [ə'vendʒ] 
v. take revenge for a perceived wrong.
v. take revenge for a perceived wrong. 61. It was a point of honor with him to avenge any insult to his family.
More similar words: scavenge, vengeance, engender, challenge, passenger, challenged, svengali, haven, avenue, heaven, heavens, ravenous, contravene, move heaven and earth, length, engine, engulf, engage, engross, engaged, English, engineer, at length, engulfed, engage in, strengthen, engrossed, engaged in, engagement, engineering.