desforzarse

A rare, mostly archaic or regional verb meaning to take revenge or right a perceived wrong by force — essentially an older equivalent of vengarse. It shows up in older legal or literary Spanish and some rural dialects rather than everyday modern speech.

• El texto antiguo cuenta cómo el noble se desforzó de la ofensa. — The old text tells how the nobleman avenged the insult.
• En el dialecto rural todavía se usa desforzarse por vengarse. — In the rural dialect, desforzarse is still used for vengarse.
• Hoy casi nadie diría desforzarse en una conversación cotidiana. — Today almost no one would say desforzarse in everyday conversation.

This is rare, archaic/regional vocabulary — vengar(se) is the verb a modern learner actually needs for "to take revenge."

Often confused with vengar.