crafty (adj.)youdaoicibaDictYouDict[crafty 词源字典]
mid-12c., crafti, from Old English cræftig "strong, powerful," later "skillful, ingenious," degenerating by c. 1200 to "cunning, sly" (but through 15c. also "skillfully done or made; intelligent, learned; artful, scientific") from craft (n.) + -y (2). Related: Craftily; craftiness.[crafty etymology, crafty origin, 英语词源]