夜不成眠 yè bù chéng mián

DEFINITIONS

  1. to be unable to sleep at night

CHARACTERS

夜 yè
HSK 5
night, dark; in night; by night
不 bù
HSK 1
no, not; un-; negative prefix
成 chéng
HSK 3
completed, finished, fixed
眠 mián
HSK 5
close eyes, sleep; hibernate