12 letters · 15 points in Scrabble
noun total lack of meaning or ideas
noun the trait of acting rashly and without prudence
originEtymology tree English mindless Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English mindlessness From mindless + -ness.
Etymology from Wiktionary, CC BY-SA 3.0