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Open the tool →夜不成寐 (yè bù chéng mèi) is a Chinese idiom (chengyu) meaning “unable to sleep at night due to worry or anxiety”.
夜不成寐 is pronounced yè bù chéng mèi in Mandarin Chinese.
Literally, 夜不成寐 means “unable to sleep at night”. It is used to mean “unable to sleep at night due to worry or anxiety”.
寐:睡着。形容因心中有事,晚上怎么也睡不着觉。