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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).


*lúčь m (accent paradigm b)

  1. ray
  2. torch


Derived terms[edit]

Related terms[edit]


  • Church Slavonic: лучь (lučĭ) (Russian)


  • Rick Derksen (2008), Etymological Dictionary of the Slavic Inherited Lexicon, Brill: Leiden-Boston, page 290
  • “*lučь” in Oleg Trubačóv (ed.) (1974–), Etimologičeskij slovarʹ slavjanskix jazykov [Etymological dictionary of Slavic languages], Moscow: Nauka, volume 16, page 163f
  • луч” in Pavel Černyx (1999), Istoriko-etimologičeskij slovarʹ russkogo jazyka [Historical-Etymological Dictionary of the Russian Language], in 2 vols (3rd ed.), Moscow: Publishing House "Russian Language", volume 1, page 496
  • луч in Max Vasmer (1986), Etimologičeskij slovarʹ russkogo jazyka [Etymological Dictionary of the Russian Language], in 4 vols (second edition), Moscow: Progress — Translated from German and supplemented by O. N. Trubačóv