不愉快 bùyúkuài unpleasant Origin Definitions Defs Strokes Stroke Words Sentences Sents 不 bù adverb not 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愉快 yúkuài adjective happy happy; cheerful; pleasant; delighted