12 letters · 17 points in Scrabble
adjective not suspicious
adjective (often followed by `of') not knowing or expecting; not thinking likely
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 suspecting English unsuspecting From un- + suspecting.
Etymology from Wiktionary, CC BY-SA 3.0