Etymology

dihydrogen

di·hy·dro·gen
D2I1H4Y4D2R1O1G2E1N1

Today it means: The divalent radical formed from two separate hydrogen atoms or ions. Full definition →

English hydrogen ← French hydrogène ← Ancient Greek γένος (génos)
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The story

  1. Proto-Indo-European*dwóh₁
  2. Proto-Indo-European*dwi-
  3. Proto-Hellenic*dwi-
  4. Ancient Greekδῐ- (dĭ-)
  5. Latindi-
  6. Englishdi-
  7. Proto-Indo-European*wed-
  8. Proto-Indo-European*wódr̥
  9. Proto-Hellenic*údōr
  10. Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
  11. Ancient Greekὑδρο- (hudro-)
  12. Frenchhydro-
  13. Proto-Indo-European*ǵenh₁-
  14. Proto-Indo-European*ǵénh₁os
  15. Proto-Hellenic*génos
  16. Ancient Greekγένος (génos)
  17. Frenchhydrogène
  18. Englishhydrogen
  19. English todaydihydrogen

From di- + hydrogen.

Etymology from Wiktionary, CC BY-SA 4.0.