10 letters · 19 points in Scrabble
noun audacious (even arrogant) behavior that you have no right to
originFrom late 17th century French effronterie, from effronté (“shameless, insolent”), from Old French esfronté, from Vulgar Latin *exfrontātus. Compare Latin effrōns (“barefaced”), from the prefix ex- (“from”) + frōns (“forehead”) (English: front). By surface analysis, ef- + front + -er + -y.
Etymology from Wiktionary, CC BY-SA 3.0