11 letters · 15 points in Scrabble
adjective with little or no preparation or forethought
originEtymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- English rehearsed English unrehearsed From un- + rehearsed.
Etymology from Wiktionary, CC BY-SA 3.0