废寝忘食
fèiqǐn-wàngshíTraditional 廢寢忘食
to forget sleep and food (absorbed in work)
Every meaning
fèiqǐn-wàngshí
- to forget sleep and food (absorbed in work)
Its characters
- 废fèiwaste; useless (as in 废物, 废话)
- 寝qǐnto sleep; bedroom (as in 寝室)
- 忘wàngto forget; to overlook
- 食shíto eat
Words with 废
Words with 寝
Meanings are from Mandarin The Wild’s own dictionary. Levels follow the official HSK word list (the exam’s 2025 syllabus, levels 7–9 shown together).