vengeful
Vengeful is an adjective describing a person or attitude characterized by a strong desire to seek revenge for a perceived wrong. A vengeful individual is motivated by the intent to punish or repay the offender, sometimes regardless of proportionality or due process. The term often carries a negative connotation, suggesting obstinacy or a tendency to harm others in the name of justice rather than to resolve a grievance.
Etymology: The word derives from vengeance, which in turn comes from Old French vengeance and Latin vindicatio/vindicare,
Usage: Vengeful describes attitudes, motives, or actions driven by revenge. In literature and media, vengeful characters
Related terms: Vindictive, revengeful, retaliation, retribution. Note that while closely related, vindictive emphasizes spite and punitive