10 letters · 18 points in Scrabble
adjective not exhibiting or characterized by careful thought
adjective without care or thought for others
adjective mentally sluggish
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 thinking English unthinking From un- + thinking.
Etymology from Wiktionary, CC BY-SA 3.0