Breaking out in a sweat is a common expression used to describe intense sweating that often occurs due to physical activity or stress. But what if we need a word to describe the opposite - the sensation of feeling cool and dry? The antonyms for break out in a sweat could be "chill out," "relax," or "unwind." These words imply a sense of ease and calmness, which is the opposite of sweating profusely. However, it's important to remember that each of these expressions has its context, and they may not always be perfect antonyms for breaking out in a sweat.