Dictionary / Vocabulary / 冷静になる
れいせいになる
to collect oneself; to cool off; to recover oneself
Also written 冷静に成る
金の支払いの話がでると、とたんに彼は冷静になる。
As soon as there is any talk of paying, he cools down.
冷静になるのに少し時間がかかりました。
It took me some time to calm down.
ああいう時に、冷静になるのは難しい。
It's hard to stay calm in a situation like that.