8 letters · 9 points in Scrabble
adjective not liable to error; -G.G.Coulton
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 erring English unerring From un- + erring.
Etymology from Wiktionary, CC BY-SA 3.0