From Proto-Balto-Slavic *śis, from Proto-Indo-European *ḱís. *sь this Declension of *sь (soft pronominal) *jь, *čьjь, *jьnъ, *kъjь, *onъ, *ovъ, *sь, *tъ...
Prussian: schis, sis Proto-Slavic: *sь (see there for further descendants) ^ Derksen, Rick (2008) “*sь”, in Etymological Dictionary of the Slavic Inherited Lexicon...
→ *ovamo *sь (“this”) → *sěmo (“here; hereto”) *tъ (“that”) → *tamo (“there; thereto”) *vьśь (“all”) → *vьśěmo (“everywhere”) Proto-Slavic terms suffixed...
From Proto-Balto-Slavic *awas, from Proto-Indo-European *h₁é. *ovъ this Declension of *ovъ (hard pronominal) *jь, *čьjь, *jьnъ, *kъjь, *onъ, *ovъ, *sь, *tъ...
*ovъ → *ovogъda *sь (“this”) → *segъda (“now”) *tъ (“that”) → *togъda (“then”) *vьśь (“all”) → *vьśegъda (“always, anytime”) Proto-Slavic terms suffixed...
*onъ, *ovъ, *sь, *tъ, *vьśь *jakъ, *jьnakъ, *kakъ, *onakъ, *ovakъ, *sicь, *takъ, *vьśakъ *koterъ, *jeterъ East Slavic: Old East Slavic: такъ (takŭ) Belarusian:...
*onъ, *ovъ, *sь, *tъ, *vьśь *jakъ, *jьnakъ, *kakъ, *onakъ, *ovakъ, *sicь, *takъ, *vьśakъ *koterъ, *jeterъ *jьnъde *jьnako East Slavic: Belarusian: і́ншы...
*jьnъ, *kъjь, *onъ, *ovъ, *sь, *tъ, *vьśь *jakъ, *jьnakъ, *kakъ, *onakъ, *ovakъ, *sicь, *takъ, *vьśakъ *koterъ, *jeterъ East Slavic: Belarusian: чый (čyj)...
*onъ, *ovъ, *sь, *tъ, *vьśь *jakъ, *jьnakъ, *kakъ, *onakъ, *ovakъ, *sicь, *takъ, *vьśakъ *koterъ, *jeterъ East Slavic: Old East Slavic: къто (kŭto),...
From *sь. *sǫda here, hither East Slavic: Belarusian: сюды́ (sjudý) Russian: сюда́ (sjudá), сюды́ (sjudý) — dialectal Solombala English: сюда (sjuda) Ukrainian:...