Chuvash Etymology From Proto-Turkic *yan- (“to burn (intr.), blaze up”). Cognate with Turkish yan- (“to burn (intr.)”) Verb ҫун • (śun) (intransitive) to burn to flame, to blaze (figurative) to burn (with passion) (of food) to burn (to become overheated to the point of being unusable) to tan, to suntan, to sunbathe (of a sauna) to become heated, to reach the right temperature Further reading “ҫун”, in Электронлă сăмахсар (overall work in Russian and Chuvash), 1996.Wikiwand - on Seamless Wikipedia browsing. On steroids.