FACETIOUS Meaning of FACETIOUS in English [ fə'si:ʃəs ]■ adjective using inappropriate humour.Derivatives~ly adverb~ness noun OriginC16: from Fr. facétieux , from facétie , from L. facetia 'jest'. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004