廢寢忘食

to neglect sleep and forget about food (idiom) / to skip one's sleep and meals / to be completely wrapped up in one's work

to abolish / to abandon / to abrogate / to discard / to depose / to oust / crippled / abandoned / waste

to lie down

to forget / to overlook / to neglect

to eat / food / animal feed / eclipse

to feed (a person or animal)