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

(literary) to own or possess, usually used in the negative to mean 'to not have even a penny'

(bound form) a single copper coin used in ancient times; used figuratively to mean the smallest amount of money as in 一文不值 yī​wén​bù​zhí