borrowed from Middle French facetieux, facecieux, from facetie "joke, jesting remark" (borrowed from Latin facētia, facētiae "cleverness, wit," in plural sense, "amusing things, jests") + -eux (going back to Latin -ōsus-ous) — more at facetiae
facetious
adjective
Synonyms & Antonyms
1 given to or marked by mature intelligent humor //the essay is a facetious commentary on the absurdity of war as a solution for international disputes