erudite (adj.)youdaoicibaDictYouDict[erudite 词源字典]
early 15c., "learned, well-instructed," from Latin eruditus "learned, accomplished, well-informed," past participle of erudire "to educate, teach, instruct, polish," literally "to bring out of the rough," from assimilated form of ex- "out" (see ex-) + rudis "unskilled, rough, unlearned" (see rude). Related: Eruditely.[erudite etymology, erudite origin, 英语词源]