can; be able to; be capable of; to have the permission or possibility to do something

Negative adverb used before verbs, adjectives, and other adverbs to indicate negation; also used as a bound-form prefix to form terms with opposite meanings

(bound form) capable; talented; (noun) a person of ability

(literary) Used at the end of a sentence to ask whether something is true; same as 否 fǒu