Antonyms for "itching to fight" would include states of calmness, peacefulness, and contentment. Such states may be described using words such as "serene", "relaxed", "at ease", "placid", "tranquil", "composed", and "unaggressive". Another set of antonyms could involve words related to a lack of desire or interest in fighting, such as "uninterested", "unmotivated", "indifferent", "apathetic", "dispassionate", and "nonconfrontational". Paired with these words, the concept of "itching to fight" would dissolve in favor of a more harmonious or non-confrontational approach to whatever situation is at hand.