The phrase "blow a fuse" refers to losing one's temper, getting angry, or losing control emotionally. Some antonyms for "blow a fuse" would be "calm down," "relax," "keep cool," "stay composed," or "remain collected." These words suggest a level-headed and rational approach to handling a situation, rather than giving in to one's emotions. Some other antonyms for "blow a fuse" could be "peaceful," "tranquil," "serene," or "unruffled." These words suggest a state of inner calm and tranquility, which is the exact opposite of getting angry or losing control. By keeping a level head and staying calm, one can avoid blowing a fuse in emotionally challenging situations.