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This Proto-Celtic 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.



Unknown, possibly from a non-Indo-European source. Cognates include Proto-Balto-Slavic *werˀź-, *wirˀź- (whence Lithuanian vìržis (heather), Latvian vir̂zis (heather), Proto-Slavic *vȇrsъ, *vȇrskъ) and Ancient Greek ἐρείκη (ereíkē, heather).[1][2][3][4] It is sometimes linked to Proto-Indo-European *wert- (to twist, turn).[5][6]


*wroikos m

  1. heather


Masculine o-stem
singular dual plural
nominative *wroikos *wroikou *wroikoi
vocative *wroike *wroikou *wroikūs
accusative *wroikom *wroikou *wroikūs
genitive *wroikī *wroikous *wroikom
dative *wroikūi *wroikobom *wroikobos
instrumental *wroikū *wroikobim *wroikobis



  1. ^ Beekes, Robert S. P. (2010), “ἐρείκη”, in Etymological Dictionary of Greek (Leiden Indo-European Etymological Dictionary Series; 10), volume I, with the assistance of Lucien van Beek, Leiden, Boston: Brill, page 452
  2. ^ Matasović, Ranko (2009) Etymological Dictionary of Proto-Celtic (Leiden Indo-European Etymological Dictionary Series; 9), Leiden: Brill, ISBN 978-90-04-17336-1, page 431
  3. ^ Derksen, Rick (2008), “*vȇrsъ, *vȇrskъ”, in Etymological Dictionary of the Slavic Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series; 4), Leiden, Boston: Brill, ISBN 978 90 04 15504 6, page 516
  4. ^ Derksen, Rick (2015) Etymological Dictionary of the Baltic Inherited Lexicon (Leiden Indo-European Etymological Dictionary Series; 13), Leiden, Boston: Brill, ISBN 978 90 04 27898 1, page 507
  5. ^ Roberts, Edward A. (2014) A Comprehensive Etymological Dictionary of the Spanish Language with Families of Words based on Indo-European Roots, volume II, Xlibris Corporation, ISBN 978-1-4931-9108-6
  6. ^ Watkins, Calvert (1985) The American Heritage Dictionary of Indo-European Roots, Boston: Houghton Mifflin Harcourt