炳炳凿凿 bǐngbǐngzáozáo well grounded Origin Definitions Defs Strokes Stroke Words Sentences Sents 炳 bǐng reduplication bright (bound form) bright; brilliant; luminous; remarkable; significant凿 鑿 záo reduplication authentic (literary) certain; authentic; irrefutable, as in the word 确凿 quèzáo