subfusc (adj.)youdaoicibaDictYouDict[subfusc 词源字典]
"moderately dark, brownish," 1710, from Latin subfuscus, variant of suffuscus, from sub- (see sub-) + fuscus "dark, dusky" (see obfuscate). Related: Subfuscous "dusky."[subfusc etymology, subfusc origin, 英语词源]