11 letters · 25 points in Scrabble
adjective admitting of no doubt or misunderstanding; having only one meaning or interpretation and leading to only one conclusion
adjective clearly defined or formulated; - R.B.Taney
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 equivocal English unequivocal From un- + equivocal.
Etymology from Wiktionary, CC BY-SA 3.0