If you take a breather, you stop what you are doing for a short time and have a rest.
例句
Relax and take a breather whenever you feel that you need one.要放松，什么时候觉得需要休息就休息一下。
英英词典释义
Noun
1. a short respite
2. air passage provided by a retractable device containing intake and exhaust pipes; permits a submarine to stay submerged for extended periods of time