Noun underpants pl Piece of underwear, covering the genitalia. Synonyms pants (British) undies (colloquial) See also boxers, boxer shorts knickers panties Y-fronts Translations Esperanto: subvestaĵo Finnish: alushousut, pikkuhousut German: Unterhose f, Schlüpfer m Indonesian: celana dalam, cawat (informal) Swedish: underbyxa, kalsonger (for men)