不贰 bù'èr undivided Origin Definitions Defs Strokes Stroke Words Sentences Sents 不贰过 bù'èrguò to not repeat a mistake (literary) to not commit the same error twice; to avoid repeating a previous mistake忠贞不贰 zhōngzhēnbù'èr unswerving in loyalty Loyal and faithful, without a change of heart or divided allegiance.