(1):

(v. i.) To take vengeance.

(2):

(v. t.) To take vengeance for; to exact satisfaction for by punishing the injuring party; to vindicate by inflicting pain or evil on a wrongdoer.

(3):

(v. t.) To treat revengefully; to wreak vengeance on.

(4):

(n.) Vengeance; revenge.