一蹶不振 yījuébùzhèn to collapse after a setback Origin Definitions Defs Strokes Stroke Words Sentences Sents 一 yī numeral one one; the number 1; single; alone蹶 jué to stumble (bound form) to fall down; to stumble; to suffer a setback or defeat as in the phrase 一蹶不振 yījuébùzhèn不振 bùzhèn listless lacking in vitality or energy; depressed; in low spirits