Etymology

cofactor

C3O1F4A1C3T1O1R1

Today it means: A contributing factor. Full definition →

English factor ← Middle English factour ← Anglo-Norman factour
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The story

  1. Proto-Indo-European*ḱe?
  2. Proto-Indo-European*ḱóm
  3. Proto-Italic*kom
  4. Proto-Italic*kom-
  5. Latincon-
  6. Latinco-
  7. Englishco-
  8. Proto-Indo-European*dʰeh₁-
  9. Proto-Indo-European*dʰeh₁k-
  10. Proto-Indo-European*dʰh₁kyéti
  11. Proto-Italic*θakjō
  12. Proto-Italic*fakjō
  13. Latinfaciō
  14. Latinfactor
  15. Middle Frenchfacteur
  16. Latinfactor
  17. Anglo-Normanfactour
  18. Middle Englishfactour
  19. Englishfactor
  20. English todaycofactor

From co- + factor.

Etymology from Wiktionary, CC BY-SA 4.0.