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.


Alternative reconstructionsEdit


From *pénkʷe (five) +‎ *déḱm̥ (ten).


Proto-Indo-European cardinal numbers
 <  40 50 60  > 
    Cardinal : *pénkʷedḱomt
    Ordinal : *penkʷedḱm̥tós[3]


  1. fifty



  1. ^ Sihler, Andrew L. (1995) New Comparative Grammar of Greek and Latin, Oxford, New York: Oxford University Press, →ISBN, page 418
  2. ^ Ringe, Donald (2006) From Proto-Indo-European to Proto-Germanic (A Linguistic History of English; 1)‎[1], Oxford: Oxford University Press, →ISBN, page 206
  3. ^ Fortson, Benjamin W. (2004, 2010) Indo-European Language and Culture: An Introduction, Oxford: Blackwell
  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