corner ston

== Middle English == === Alternative forms === corner-ston, cornerstone, corner-stone, corner stoon, kernere-ston, kornerstone === Etymology === Compound of corner +‎ ston; a calque of Latin lapis angularis. === Pronunciation === IPA(key): /ˈkɔrnər ˌstɔ̝ːn/, /kɔrˈneːr ˌstɔ̝ːn/ === Noun === corner ston (plural corner-stonys) A cornerstone; a keystone. (figurative) A foundation on which something is built; an innovator. ==== Descendants ==== English: cornerstone, corner-stone, corner stone Scots: cornerstane ==== References ==== “corner-stōn, n.”, in MED Online, Ann Arbor, Mich.: University of Michigan, 2007, retrieved 8 July 2018.