失效 shīxiào HSK7 to become invalid Origin Definitions Defs Strokes Stroke Words Sentences Sents shīxiào to become invalid 失 shī verb to lose to lose; to misplace; to no longer possess something效 xiào nounverb effect (bound form) effect; result; efficacy; functionshīxiào failure 失 shī nounverb mistake (bound form) a mistake; a fault; a defect; a mishap效 xiào nounverb effect (bound form) effect; result; efficacy; function