The phrase "has a bone to pick" refers to someone who wants to discuss a problem or disagreement with someone else. Antonyms for this phrase could include "at peace," "in agreement," "content," or "satisfied." These words describe a sense of harmony or satisfaction rather than conflict. Other antonyms could include "indifferent," "uninterested," or "apathetic," indicating a lack of any strong feelings or opinions on a particular matter. While having a bone to pick can sometimes be productive if handled properly, there are many situations where it is more desirable to be at peace and in agreement with others.