Numbers

  one

  two

  three

  four

  five, hand

  As for the Indo-European numerals:

  one    ?
  
  two    has a cognate in AfroAsiatic and Austronesian

  three  has a cognate in AfroAsiatic and Austronesian

  four   has a cognate in Austronesian

  five   has a cognate in AfroAsiatic and a related 
         cognate in the Austronesian word for "hand"

  six    has a cognate in AfroAsiatic

  seven  has a cognate in AfroAsiatic

  eight  is reconstructible from within Proto-IndoEuropean

  nine   has been related to the Proto-IndoEuropean root 
         for "new" i.e. the next after eight

  which speaks volumes of the antediluvian cultural level 
  of Indo-European speakers (or perhaps not, cf the use of
  Chinese numerals in Japanese or Danish numerals in Greenland
  Eskimo).

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