12 letters · 17 points in Scrabble
adjective not easily solved; ; - C.L.Jones
adjective not capable of being resolved
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 resolvable English unresolvable From un- + resolvable.
Etymology from Wiktionary, CC BY-SA 3.0