The antonyms for "show forgiveness" are abundant and varied. Some common antonyms include "hold grudges," "seek revenge," "nurture resentment," "act vengeful," "bear malice," and "maintain animosity." These antonyms point towards the opposite of forgiving someone and emphasize the negative emotions such as anger and resentment. When we do not show forgiveness, we are at risk of harboring negative emotions that can lead to further conflicts, mistrust, and misunderstandings. Therefore, it is crucial to practice forgiveness as a way of promoting peace, reconciliation, and positive relationships.