Etymology

autoreactive

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Today it means: Acting against the organism by which it was produced Full definition →

English reactive ← Middle English acte ← Old French act
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The story

  1. Proto-Indo-European*h₂ew
  2. Proto-Indo-European*tó-
  3. Proto-Hellenic*autós
  4. Proto-Indo-European*h₂ew
  5. Ancient Greekαὖ (aû)
  6. Ancient Greekτόν (tón)
  7. Ancient Greekαὐτός (autós)
  8. Ancient Greekαὐτο- (auto-)
  9. Englishauto-
  10. Proto-Italic*wre-
  11. Latinre-
  12. Old Frenchre-
  13. Middle Englishre-
  14. Englishre-
  15. Proto-Indo-European*h₂eǵ-
  16. Proto-Indo-European*h₂éǵeti
  17. Proto-Italic*agō
  18. Latinagō
  19. Latināctus
  20. Latinācta
  21. Old Frenchact
  22. Middle Englishacte
  23. Englishact
  24. Englishreact
  25. Englishreactive
  26. English todayautoreactive

From auto- + reactive.

Etymology from Wiktionary, CC BY-SA 4.0.