Webster's Revised Unabridged Dictionary · 1913

Avenge

Avenge ({not transcribed}) , transitive verb

[Old French avengier; Latin ad + vindicare to lay claim to, to avenge, revenge. See Vengeance.]

1.
To take vengeance for; to exact satisfaction for by punishing the injuring party; to vindicate by inflicting pain or evil on a wrongdoer.
He will avenge the blood of his servants. — Deut. xxxii. 43
Avenge, O Lord, thy slaughtered saints, whose bones Lie scattered on the Alpine mountains cold. — Milton
He had avenged himself on them by havoc such as England had never before seen. — Macaulay
2.
To treat revengefully; to wreak vengeance on. [Obsolete]
Thy judgment in avenging thine enemies. — Bp. Hall
I avenge myself upon another, or I avenge another, or I avenge a wrong. I revenge only myself, and that upon another. — C. J. Smith

Avenge , intransitive verb

To take vengeance.

Avenge , noun

Vengeance; revenge. [Obsolete] — Spenser