sesquipedalian: [17] Sesquipedalian means etymologically ‘a foot and a half long’. Its use in English was inspired by the Roman poet Horace’s phrase sesquipedalia verba, literally ‘words a foot and a half long’, hence ‘preposterously long words that sound pompous’ – of which sesquipedalian itself is an appropriately good example. It is a compound word formed from the Latin prefix sesqui- ‘half as much again’ (a derivative of sēmi- ‘half’) and pēs ‘foot’. => foot, pedal[sesquipedalian etymology, sesquipedalian origin, 英语词源]