れいせい 冷静になる Show inflections LinksSentence search for 冷静になるSentence search for れいせいになるSentence search for 冷静に成るKanji details for 冷 and 静Edit in JMdict Expressions (phrases, clauses, etc.), Godan verb with 'ru' ending1. to collect oneself; to cool off; to recover oneselfAntonym: 感情にはしるかんじょう感情にはしるな。れいせい冷静になれ！Don't let your emotions rule you. Be calm!Other forms冷静に成る 【れいせいになる】 Discussions Log in to talk about this word.