Definition of avenges:
(v) :
(transitive) To take vengeance (for); to exact satisfaction for by punishing the injuring party; to vindicate by inflicting pain or evil on a wrongdoer.
(v) :
(reflexive) To revenge oneself (on or upon someone).
(v) :
(intransitive, obsolete) To take vengeance.
(v) :
(transitive, archaic) To treat revengefully; to wreak vengeance on.
(n) :
(archaic) An act of vengeance; a revenge.