How to Say "to avenge" in Spanish
The Spanish word for “to avenge” is “vengar” — B1 level.
Examples
El caballero juró vengar a su rey.
The knight swore to avenge his king.
Espero vengar la derrota del año pasado en este partido.
I hope to avenge last year's defeat in this game.
No puedes vengar una injusticia con otra injusticia.
You cannot avenge an injustice with another injustice.
The 'G' to 'GU' spelling change
To keep the hard 'G' sound (like in 'game'), the 'g' changes to 'gu' whenever the next letter is an 'e'. You'll see this in the 'yo' form of the past tense (vengué) and in all the special 'wishes and commands' (subjunctive) forms.
Avenge vs. Take Revenge
Use 'vengar' when you are talking about the person or the thing you are getting justice for (e.g., 'vengar a su padre'). If you want to say 'to take revenge on someone' for yourself, you usually use the reflexive version 'vengarse'.
Missing the 'u' in the past
Mistake: “Yo vengé a mi amigo.”
Correction: Yo vengué a mi amigo. (Without the 'u', the 'g' would sound like an 'h'!)
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