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This Proto-Slavic entry contains reconstructed words and roots. As such, the term(s) in this entry are not directly attested, but are hypothesized to have existed based on comparative evidence.



From Proto-Balto-Slavic *sam-, from Proto-Indo-European *som (Derksen) or *sem- (together, one).

Baltic cognates include Lithuanian sam-, Latvian suo-, Old Prussian sen-.

Indo-European cognates include Sanskrit सम् (sam, together, at the same time), Avestan 𐬵𐬀𐬨(ham-), 𐬵𐬀(ha-), Old Persian [script needed] (ham-), Ancient Greek ὁμοῦ (homoû, together), ἅμα (háma, together with), ἁ- (ha-), Latin semel (once, a single time).



  1. (Nominal prefix) together

Derived terms[edit]

Related terms[edit]


  • East Slavic:
    • Belarusian: су- (su-)
    • Russian: су- (su-), со- (so-)
    • Ukrainian: су- (su-)
  • South Slavic:
    • Old Church Slavonic:
      Old Cyrillic: сѫ- (sǫ-)
      Glagolitic: ⱄⱘ- (sǫ-)
    • Bulgarian: съ- (sǎ-)
    • Serbo-Croatian:
      Cyrillic: су-
      Latin: su-
    • Slovene: so-
  • West Slavic:


  • Derksen, Rick (2008) Etymological Dictionary of the Slavic Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series; 4), Leiden, Boston: Brill, →ISBN, page 462
  • Vasmer (Fasmer), Max (Maks) (1964–1973), “су-”, in Etimologičeskij slovarʹ russkovo jazyka [Etymological Dictionary of the Russian Language] (in Russian), translated from German and supplemented by Trubačóv Oleg, Moscow: Progress
  • Černyx, P. Ja. (1999), “су-”, in Istoriko-etimologičeskij slovarʹ russkovo jazyka [Historical-Etymological Dictionary of the Russian Language] (in Russian), volume 2, 3rd reprint edition, Moscow: Russkij jazyk, page 215