The phrase "am out for blood" is an idiom that means someone is fiercely determined, aggressive, and seeking revenge. Some antonyms for this phrase could include "calm," "peaceful," "merciful," "forgiving," "conciliatory," or "restrained." These words suggest the opposite of wanting to harm someone or seeking revenge. They embody qualities like patience, love, and empathy, which can help diffuse conflicts and create positive outcomes. It is important to recognize that words have immense power, and we can intentionally choose language that promotes kindness and understanding, rather than violence or aggression.