menhir (n.)

"ancient upright monumental stone," very abundant in Brittany but also found in other places, 1834, from French menhir (19c.), from Breton, literally "long stone," from men "stone" + hir "long," from PIE *se-ro-, from root *se- "long, late" (see soiree). Cognate with Welsh maen hir, Cornish medn hir.