sanguinous (adj.)youdaoicibaDictYouDict[sanguinous 词源字典]
late 15c., "bloodshot," from Middle French sanguineux, from Late Latin sanguinosus "full of blood," from Latin sanguis "blood" (see sanguinary). Meaning "pertaining to blood" is from 1813.[sanguinous etymology, sanguinous origin, 英语词源]