The phrase "breaks a sweat" typically implies that someone is working hard or exerting themselves physically. Some antonyms for this phrase could include "coasting," "lounging," "relaxing," or "taking it easy." These words suggest a lack of effort or activity, and therefore, the absence of sweating. However, it's important to note that sweating can also be a sign of anxiety, nervousness, or stress. In those cases, antonyms for "breaks a sweat" might include "calmly handles the situation," "keeps composure," or "remains unfazed." Overall, antonyms for "breaks a sweat" can range from words that suggest laziness to those that imply emotional stability in challenging situations.