Etymology

multifactorial

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Today it means: Involving, or controlled by multiple factors. Full definition →

English factorial ← Proto-Indo-European *h₂élisder.? ← Middle English factour
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The story

  1. Proto-Indo-European*mel-
  2. Proto-Indo-European*ml̥tós?
  3. Proto-Italic*moltos
  4. Latinmultus
  5. Latinmultī
  6. Middle Englishmulti-
  7. Englishmulti-
  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. Proto-Indo-European*h₂el-
  21. Proto-Indo-European*h₂élisder.?
  22. Englishfactorial
  23. English todaymultifactorial

From multi- + factorial.

Etymology from Wiktionary, CC BY-SA 4.0.