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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 *kup-, from , from Proto-Indo-European *kwep- (to smoke, to boil, to move) (reconstructed as *kweh₁p- in Rix (LIV), but per Derksen the laryngeal is unnecessary). Cognate with Lithuanian kūpė́ti (to boil over), 1sg. kūpù, 3sg. kū̃pa, Latvian kupêt, kupôt (to seethe). Probably also cognate with Sanskrit कुप्यति (kúpyati, to be angry, to boil with emotion) and Latin cupiō (to desire). Vasmer and Chernykh also link Latvian kûpêt (to smoke, to steam) but per Derksen this belongs to a different Indo-European root *k(ʷ)h₂up-.


*kypě̀ti impf

  1. to boil, to seethe




  • Derksen, Rick (2008), “*kypě̀ti”, in Etymological Dictionary of the Slavic Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series; 4), Leiden, Boston: Brill, →ISBN, page 266
  • Vasmer, Max (1964–1973), “кипе́ть”, in Etimologičeskij slovarʹ russkovo jazyka [Etymological Dictionary of the Russian Language] (in ru), translated from German and supplemented by Trubačóv O. N., Moscow: Progress
  • Černyx, P. Ja. (1999), “кипе́ть”, in Istoriko-etimologičeskij slovarʹ russkovo jazyka [Historical-Etymological Dictionary of the Russian Language] (in ru), volume 1, 3rd reprint edition, Moscow: Russkij jazyk, page 396–397
  • Rix, Helmut, editor (2001) Lexikon der indogermanischen Verben [Lexicon of Indo-European Verbs] (in de), 2nd edition, Wiesbaden: Dr. Ludwig Reichert Verlag, →ISBN
  • Trubačev O. N., editor (1981), “*kypěti”, in Etimologičeskij slovarʹ slavjanskix jazykov [Etymological dictionary of Slavic languages] (in ru), volume 08, Moscow: Nauka, page 265