Read Edit View history 无效 wúxiào HSK6 invalid Origin Definitions Defs Strokes Stroke Words Sentences Sents Senses Add sense 无效/ 無效 wúxiào invalid to have no effect; to be ineffective, useless, or null and void Edit Delete References Add reference antonym 无效/無效 → 有效/有效 Edit Delete see 无效/無效 → 失效/失效 Edit Delete antonym 收效/收效 → 无效/無效 Edit Delete