Merriam-Webster Online: Main Entry: ses-qui-pe-da-lian Pronunciation: 'ses-kwuh-puh-DAIL-yun' Function: adjective Etymology: Latin sesquipedalis, literally, a foot and a half long, from sesqui- + ped-, pes foot--more at FOOT 1 : having many syllables : LONG, as in "sesquipedalian terms" 2 : given to or characterized by the use of long words, as in "a sesquipedalian television commentator"