不透水 bùtòushuǐ waterproof Definitions Defs Origin 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透水 tòushuǐ permeable to be permeable; allowing water to pass through
