語彙

to make an effort; to try hard; to strive

hard-working; conscientious

hardworking

diligent

to eat; to consume

to eat at (a cafeteria etc)

to eradicate; to destroy

to absorb

to suffer (shock, injury, defeat etc)

variant of 吃

to use

to employ

to have to

to eat or drink

expense or outlay

usefulness

hence

therefore