See also: Appendix:Variations of "sis" Yakut Yakut Wikipedia has an article on:Сис (география)Wikipedia sahEtymology Inherited from Proto-Turkic *yïĺ.[1] Compare Old Turkic 𐰖𐰃𐱁 (y¹iš /yïš/), Kyrgyz жыш (jış). Noun сис • (sis) (anatomy) spine, especially the lower back Synonym: көҕүс (köğüs) ridge, mountain range (literal or figurative) backbone Synonym: уорҕа (uorğa) Derived terms сис быата (sis bıata, “cross-saddle belt”) (part of a horse's harness) References [1]Starostin, Sergei, Dybo, Anna, Mudrak, Oleg (2003) “*jɨĺ”, in Etymological dictionary of the Altaic languages (Handbuch der Orientalistik; VIII.8), Leiden, New York, Köln: E.J. Brill Wikiwand - on Seamless Wikipedia browsing. On steroids.