endemic (adj.)youdaoicibaDictYouDict[endemic 词源字典]
"particular to a people or locality," 1650s (endemical), with -ic + Greek endemos "native, dwelling in (a place), of or belonging to a people," from en "in" (see en- (2)) + demos "people, district" (see demotic). From 1660s as a noun.[endemic etymology, endemic origin, 英语词源]