8 letters · 14 points in Scrabble
noun memorial consisting of a very large stone forming part of a prehistoric structure (especially in western Europe)
originPIE word *méǵh₂s From mega- (prefix meaning ‘very large, great’) + -lith (suffix meaning ‘stone’), a back-formation from megalithic probably modelled after monolith. from Ancient Greek λίθος (líthos, “stone”)
Etymology from Wiktionary, CC BY-SA 3.0