STUPENDOUS Meaning of STUPENDOUS in English [ stju:'pɛndəs ]■ adjective extremely impressive.Derivatives~ly adverb~ness noun OriginC16: from L. stupendus 'to be wondered at' (gerundive of stupere ) + -ous . Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004