10 letters · 12 points in Scrabble
adjective without a basis in reason or fact
originFrom Middle English groundles (“bottomless”), from Old English grundlēas, from Proto-Germanic *grundulausaz, equivalent to ground + -less. Cognate with Dutch grondeloos, German Low German grundlos, German grundlos, Danish grundløs, Swedish grundlös.
Etymology from Wiktionary, CC BY-SA 3.0