chiaroscuro (n.)youdaoicibaDictYouDict[chiaroscuro 词源字典]
1680s, "disposition of light and dark in a picture," literally "bright-dark," from Italian chiaro "clear, bright" (from Latin clarus; see clear (adj.)) + oscuro (from Latin obscurus; see obscure (adj.)). Related: Chiaroscurist.[chiaroscuro etymology, chiaroscuro origin, 英语词源]