revengeful, vindictive, vengeful (adj)

disposed to seek revenge or intended for revenge

"more vindictive than jealous love"- Shakespeare; "punishments...essentially vindictive in their nature"- M.R.Cohen

despiteful, spiteful, vindictive (adj)

showing malicious ill will and a desire to hurt; motivated by spite

"a despiteful fiend"; "a truly spiteful child"; "a vindictive man will look for occasions for resentment"

vindictive (Adjective)

Having a tendency to seek revenge when wronged.

vindictive

Revenge is committing a harmful action against a person or group in response to a grievance, be it real or perceived. Primitive justice or retributive justice is often differentiated from more formal and refined forms of justice such as distributive justice and divine judgment.