10 letters · 18 points in Scrabble
adjective not having official authority or sanction
adjective not officially established
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 official English unofficial From un- + official.
Etymology from Wiktionary, CC BY-SA 3.0