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

to decorate; to embellish; to make something look better or more presentable

(bound form) a person's appearance, dress, or attire; especially used with 不修边幅 bù​xiū​biān​fú to describe a person who is untidy or careless about their looks