The phrase "buried hatchet" implies forgiveness and the resolution of a conflict. However, there are several antonyms for this phrase that describe the opposite scenario. "Unsettled dispute" describes a disagreement that has not been resolved, while "held grudge" suggests that one party is still harboring negative feelings towards the other. "Rekindled animosity" implies that a conflict that was once resolved has been reignited, while "escalated tension" suggests that the conflict has grown more intense. These opposing phrases demonstrate the importance of forgiveness and working towards resolution in order to avoid further conflict and tension.