stupendous (adj.)youdaoicibaDictYouDict[stupendous 词源字典]
1660s, correction of earlier stupendious "causing astonishment, astounding" (1540s), from Late Latin stupendus "to be wondered at," gerundive of Latin stupere "be stunned, be struck senseless, be aghast, astounded, or amazed" (see stupid). Related: Stupendously; stupendousness.[stupendous etymology, stupendous origin, 英语词源]