The phrase "broke out in sweat" refers to the sudden and excessive production of perspiration due to various factors such as anxiety, fear, physical exertion, or hot weather. However, there are several antonyms to this phrase, including "dry as a bone," "cool as a cucumber," "unperturbed," and "composed." These words indicate the absence of sweating or any sign of nervousness or discomfort. When someone is "dry as a bone," it means they are calm and collected, while "cool as a cucumber" refers to someone who remains calm and unruffled in a difficult situation. Therefore, using antonyms of "broke out in sweat" will help to communicate different moods and emotions accurately.