Definition: to become calmer, or to make someone become calmer Level: B2
让她先冷静下来，然后再跟她谈。
Just leave her to ___cool ___off and then talk to her.
我觉得你压力很大。如果我是你，我会稍微冷静一下。
It seemed to me that you were stressed. If I were you, I would ___cool ___down a little.
在公园散步有助于让他冷静下来。
A walk in the park helped ___cool him ___down.
