to break a sweat
01
to need to put a lot of hard work or energy into doing something
![to [break] a sweat definition and meaning](https://cdn.langeek.co/photo/44232/original/?type=jpeg "to [break] a sweat definition and meaning")
idiom
informal
例子
I had to break a sweat to finish that marathon; it was a grueling race.
02
to begin sweating because of physical effort or exertion
例子
They spent hours dancing without breaking a sweat.
