10 letters · 13 points in Scrabble
adjective not beset by troubles or disturbance or distress
adjective free from fear or doubt; easy in mind
adjective free from turmoil or worries
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 troubled English untroubled From un- + troubled.
Etymology from Wiktionary, CC BY-SA 3.0