vengeance

Vengeance comes from Anglo-Norman vengeaunce, from Old French vengeance (also venjance), built from the verb vengier, meaning 'to avenge,' plus the suffix -ance.

The word was formed by taking the act named in vengier and turning it into a noun — the state or result of avenging something.

It shares its root with 'avenge,' both growing from the same Old French vengier.