effrontery Look up effrontery at Dictionary.com
1715, from Fr. effronterie, from effronte "shameless," from O.Fr. esfronte, probably from L.L. effrontem (nom. effrons) "barefaced," from L. ex- "out" + frontem (nom. frons) "brow" (see front). L. frontus had a sense of "ability to blush," but the lit. sense of effrontery has usually been taken to be "putting forth the forehead."