efferent (adj.)youdaoicibaDictYouDict[efferent 词源字典]
"conveying outward or away," 1827, from Latin efferentem (nominative efferens), present participle of effere "to carry out or away, bring forth," from ef- (see ex-) + ferre "to bear, carry" (see infer). As a noun from 1876.[efferent etymology, efferent origin, 英语词源]