不慎 bùshèn HSK7 careless Origin Definitions Defs Strokes Stroke Words Sentences Sents 一着不慎，满盘皆输 yīzhāobùshènmǎnpánjiēshū one careless move loses the whole game One wrong move at a critical point leads to total defeat; a proverb derived from chess used to describe how a single mistake in a key step can ruin an entire endeavor.