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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-Indo-European *lowkis, from *lewk- (white; light; bright).

Baltic cognates include Old Prussian luckis (torch, log).

Indo-European cognates include Sanskrit रोचि (roci, ray), रोचिस् (rocis, light, lustre), Latin lūx (light).


*lũčь m

  1. ray
  2. torch


Derived terms[edit]

Related terms[edit]


  • Church Slavonic: лучь (lučĭ) (Russian)


  • Derksen, Rick (2008) Etymological Dictionary of the Slavic Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series; 4), Leiden, Boston: Brill, ISBN 978 90 04 15504 6, page 290
  • Trubačev O. N., editor (1990), “*lučь”, in Etimologičeskij slovarʹ slavjanskix jazykov [Etymological dictionary of Slavic languages] (in Russian), volume 16, Moscow: Nauka, page 163f
  • Černyx, P. Ja. (1999), “луч”, in Istoriko-etimologičeskij slovarʹ russkovo jazyka [Historical-Etymological Dictionary of the Russian Language] (in Russian), volume 1, 3rd reprint edition, Moscow: Russkij jazyk, page 496
  • Vasmer, Max (1964–1973), “луч”, in Etimologičeskij slovarʹ russkovo jazyka [Etymological Dictionary of the Russian Language] (in Russian), translated from German and supplemented by Trubačev O. N., Moscow: Progress