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This Proto-Indo-European entry contains reconstructed terms 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 earlier *dwidḱómt, with loss of initial *d- (or perhaps, as suggested by Hellenic, dissimilation to *h₁-) and compensatory lengthening, from *dwi- (two) +‎ *déḱm̥ (ten). The change from *wīdḱómt- > wīḱm̥t- was in analogy to *déḱm̥ (ten).


Proto-Indo-European cardinal numbers
 <  10 20 30  > 
    Cardinal : *wídḱm̥ti
    Ordinal : *widḱm̥tós[1]


  1. twenty

Alternative reconstructions[edit]



  1. ^ Fortson, Benjamin W. (2004, 2010) Indo-European Language and Culture: An Introduction, Oxford: Blackwell
  2. ^ Sihler, Andrew L. (1995) New Comparative Grammar of Greek and Latin, Oxford, New York: Oxford University Press, →ISBN, page 418
  3. ^ Ringe, Donald (2006) From Proto-Indo-European to Proto-Germanic (A Linguistic History of English; 1)‎[1], Oxford: Oxford University Press, →ISBN, page 205
  4. ^ Beekes, Robert S. P. (2011) Comparative Indo-European Linguistics: An Introduction, revised and corrected by Michiel de Vaan, 2nd edition, Amsterdam, Philadelphia: John Benjamins Publishing Company, page 238
  5. ^ Adams, Douglas Q. (2013), “ikante”, in A Dictionary of Tocharian B: Revised and Greatly Enlarged (Leiden Studies in Indo-European; 10), Amsterdam, New York: Rodopi, →ISBN, page 66
  6. ^ De Vaan, Michiel (2008), “vīgintī”, in Etymological Dictionary of Latin and the other Italic Languages (Leiden Indo-European Etymological Dictionary Series; 7), Leiden, Boston: Brill, →ISBN, page 678