无效 Traditional 無效 wú xiào 🔊 not valid HSK 5 + Review this word Meanings wú xiào 無效 not validineffectivein vain Its characters 无wúnot to haveHSK 4效xiàoeffect In sentences Pinyin 我wǒ的de信用卡xìn yòng kǎ无效wú xiào。My credit card was invalid. #11750249 Words with 无效 毫无效果 háo wú xiào guǒ to no avail 无效社交 wú xiào shè jiāo unproductive social interaction