效力 xiào lì 🔊 effectiveness HSK 7–9 + Review this word Meanings xiào lì effectivenesspositive effectto serve (in some capacity) Its characters 效xiàoeffect力lìpowerHSK 5 In sentences Pinyin 这zhè份fèn合同hé tong没有méi yǒu法律fǎ lǜ效力xiào lì。This contract is null and void. #9958559