9 letters · 14 points in Scrabble
adjective incorrigible
adjective unrestrained by convention or propriety; ; ; - Los Angeles Times; ; ; - Bertrand Russell
originSouthern American slang, implied by bodaciously, 1837, either from bodyaciously (“bodily, totally, root and branch”, antebellum South Carolina) or a blend of bold and audacious.
Etymology from Wiktionary, CC BY-SA 3.0