Reconstruction:Proto-Slavic/kъsьnъ

Etymology
Per Derksen, from, probably continuing an obscure. Cognate with 🇨🇬, 🇨🇬.

Trubachev proposes instead a connection to 🇨🇬 (or 🇨🇬 in that matter) via semantic shift sour → overpassed its expiration date → late similar to from.

Technically, could also reflect an earlier akin to 🇨🇬, 🇨🇬, 🇨🇬 and further 🇨🇬. Per Snoj, ultimately from, probably a t-extension of 🇨🇬.

Adjective

 * 1) slow, late

Descendants

 * South Slavic: