Long-Held Resentment Against Another

This page is the CodyCross answer for the clue below from Underground Worlds, Group 2170, Puzzle 1 (Crystals and Gems).

Question is: Long-Held Resentment Against Another

and the answer is: GRUDGE

Word Meaning:

GRUDGE — (countable) Deep-seated and/or long-term animosity or ill will about something or someone, especially due to perceived mistreatment.

Definitions from Wiktionary.