lose your cool (rūzu yō kuuru)

Idiom Patience

意味

to become angry or impatient

怒るか、忍耐を失う (okoru ka, nintai o ushinau)

例文

"Don’t lose your cool; the situation will get better."

"冷静さを失わないで;状況は良くなります。" (Reisei-sa o ushinawa nai de; jōkyō wa yoi hōkō ni susumu.)