15 letters · 18 points in Scrabble
adjective unsupported by other evidence
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 substantiated English unsubstantiated From un- + substantiated.
Etymology from Wiktionary, CC BY-SA 3.0