The phrase "on warpath" refers to someone who is angry, agitated, or ready for a fight. Antonyms for this phrase include peaceful, calm, and serene. If someone is taking a peaceful approach, they are seeking to resolve a conflict or issue in a non-violent manner. Alternatively, if someone is calm, they are able to maintain their composure and avoid escalating a situation. Serenity implies a state of tranquility and contentment, which is the opposite of the aggressive mindset associated with being on warpath. In any situation, it is always better to seek a peaceful resolution rather than resorting to violence or confrontation.