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.

Proto-Indo-European edit

Alternative reconstructions edit

Etymology edit

From *kʷetwr̥- (four) +‎ *déḱm̥ (ten).

Numeral edit

Proto-Indo-European cardinal numbers
 <  30 40 50  > 
    Cardinal : *kʷétwr̥dḱomt
    Ordinal : *kʷetwr̥dḱm̥tós[2]


  1. forty

Descendants edit

References edit

  1. ^ Sihler, Andrew L. (1995) New Comparative Grammar of Greek and Latin, Oxford, New York: Oxford University Press, →ISBN, page 418
  2. ^ Fortson, Benjamin W. (2004, 2010) Indo-European Language and Culture: An Introduction, Oxford: Blackwell
  3. ^ 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