What is a grudge in poetry?

In poetry, a grudge refers to a deep-seated feeling of resentment or ill will held against someone who has wronged or offended the speaker. It suggests long-term bitterness and hostility that has not been resolved or let go of. Grudges are often explored in poetry as a means of conveying pent-up emotions, exploring conflict, and expressing unresolved personal or collective histories. Poets may use various themes, metaphors, and emotional language to portray the complexity, weight, and impact of holding onto a grudge.