Etymology

counterion

C3O1U1N1T1E1R1I1O1N1

Today it means: Any ion of opposite charge to another in a solution or other electrochemical system Full definition →

English ion ← Ancient Greek ἰόν (ión) ← Proto-Hellenic *éimi
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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. Proto-Italic*komteros
  6. Proto-Italic*komterād
  7. Latincontrā
  8. Old Frenchcontre-
  9. Anglo-Normancountre-
  10. Middle Englishcounter-
  11. Englishcounter-
  12. Proto-Indo-European*h₁ey-
  13. Proto-Indo-European*h₁éyti
  14. Proto-Hellenic*éimi
  15. Ancient Greekἰόν (ión)
  16. Englishion
  17. English todaycounterion

From counter- + ion.

Etymology from Wiktionary, CC BY-SA 4.0.