Etymology

millionth

M3I1L1L1I1O1N1T1H4

Today it means: The ordinal form of the number one million. Full definition →

English million ← Middle English milioun ← Middle French million
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The story

  1. Proto-Indo-European*sem-
  2. Proto-Indo-European*sm̥-
  3. Proto-Indo-European*smih₂
  4. Proto-Indo-European*ǵʰes-
  5. Proto-Indo-European*ǵʰéslom
  6. Proto-Indo-European*ǵʰéslih₂
  7. Proto-Indo-European*smih₂ǵʰéslih₂
  8. Proto-Italic*smīɣeslī
  9. Latinmīlle
  10. Italianmille
  11. Italianmilione
  12. Old Frenchmillion
  13. Middle Frenchmillion
  14. Middle Englishmilioun
  15. Englishmillion
  16. English todaymillionth

From million + -th (ordinal suffix).

Etymology from Wiktionary, CC BY-SA 4.0.