Breaking out a sweat is a common phrase used to describe perspiring or sweating, but there are several antonyms that can be used to describe the opposite of sweating. Antonyms for breaking out a sweat include words such as dry, cool, calm, and composed. Instead of perspiring, someone may be dry or have a dryness to their skin. Cool is another antonym, often describing someone who is calm and collected. Calm and composed are also antonyms, both suggesting a sense of serenity that is absent in someone who is sweating or experiencing an outburst of energy. Together, these words provide a range of alternatives to the common phrase "breaking out a sweat.