栽跟斗 zāigēndǒu to tumble Definitions Defs Origin Strokes Stroke Words Sentences Sents zāigēndǒu to tumble 栽 zāi to fall to stumble; to fall headfirst; to tumble down跟斗 gēndou fall A stumble or tumble caused by losing balance; a setback or failure.zāigēndǒu to suffer a setback · to lose face 栽 zāi to lose face (colloquial) to suffer a setback; to fail or lose face跟斗 gēndou fall A stumble or tumble caused by losing balance; a setback or failure.