Meaning

noun a rectangular block of hewn stone used for building purposes

originFrom Middle English assheler, acheler, etc., from forms of Old French esselier (“wooden support, traverse beam”), from Medieval Latin ascelāris and assellāris (equivalent to a diminutive of early forms of ais (“plank”)), variant of *axillāris (attested only after the Renaissance), from Latin axilla (“little plank”) + -āris (“-ary: forming adjectives”), from axis (“axle, plank”) + -illa (“-ella:…

Etymology from Wiktionary, CC BY-SA 3.0