however; but; yet; often used in formal or written Chinese to show a contrast with what was previously stated

Used before a negative word to emphasize a point or correct a misconception, often meaning "not at all" or "not actually"

to not possess something or for something to not exist; there is not; to be without

Used as a question word to ask about the identity, nature, or name of a person or thing.

(slang) nothing; of no use; useless, often in the phrase 有个卵用 yǒu​gè​luǎn​yòng

Usefulness; utility; the effect or function of something.