plenteous (adj.)youdaoicibaDictYouDict[plenteous 词源字典]
c. 1300, plentivous, from Old French plentiveus "fertile, rich" (early 13c.), from plentif "abundant," from plentee "abundance" (see plenty). Related: Plentifully; plentifulness.[plenteous etymology, plenteous origin, 英语词源]