vindictive
adj.feeling or showing a desire to hurt someone who has hurt you. You use this to describe someone who is angry and wants to get even.
adj.characterised by a desire to take revenge or cause harm to someone who has caused injury or loss. Often used to describe a person's personality or a specific action.
“He acted in a vindictive way after losing the game.”
“The manager's vindictive response to the employee's mistake led to a formal complaint from the team.”
“The novel explores the psychological toll of a vindictive revenge plot, showing how the protagonist's quest for justice eventually consumes his own life.”
“They will be sickened and embarrassed to have a parent be so callous and vindictive.”
From Latin vindicta (“vengeance”) + -ive. Contrast Latin vindicātīvus.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.