家珍 jiāzhēn family treasure Origin Definitions Defs Strokes Stroke Words Sentences Sents 如数家珍 rúshǔjiāzhēn to know very well (idiom) lit. as if enumerating one's family valuables; fig. to be very familiar with a subject or matter若数家珍 ruòshǔjiāzhēn to know very well as if counting one's family treasures; to be thoroughly familiar with something