不合理 bùhélǐ unreasonable 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合理 hélǐ adjective reasonable rational; sensible; fair; conforming to reason or logic