vindictive

disposed to seek revenge or intended for revenge

Disposed to revenge; prompted or characterized by revenge; revengeful.

Latin 'vindicta' meaning vengeance

“Lady Blandish had revived his jealousy of the creature who menaced it, and jealousy of a System is unreflecting and vindictive as jealousy of woman.”

— George Meredith, Complete Project Gutenberg Works of George Meredith

Ife, sipping sangria on Barcelona's beach, spotted her ex-building from a vindictive sandcastle. Waves sculpted his face, nose getting longer each minute. "Perfect," she chuckled, adding more sand for good measure. Revenge was best served seaside.

At Chennai's Mylapore temple fair, Yemi's eyes narrowed as she spotted her rival weaving through the crowded stalls. With a swift motion, she slipped a pinch of chilies into the rival's bag of sweet jalebis, a vindictive twist to ensure the taste would linger.

“He could be self-righteous, resentful, and vindictive, often holding grudges for years.”