Etymology

perfluoro

P3E1R1F4L1U1O1R1O1

Today it means: Describing any compound or radical in which every hydrogen atom has been replaced by fluorine Full definition →

English fluoro ← Middle English o ← Old French oh
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The story

  1. Proto-Indo-European*per-der.?
  2. Proto-Indo-European*pér
  3. Proto-Italic*per
  4. Latinper
  5. Proto-Indo-European*per-
  6. Proto-Italic*peri-
  7. Latinper-
  8. Englishper-
  9. Proto-Indo-European*bʰel-
  10. Proto-Indo-European*bʰlewH-
  11. Proto-Indo-European*bʰluH-yé-ti?
  12. Latinfluō
  13. Latinfluor
  14. Englishfluor
  15. Englishfluorite
  16. Middle Low Germanspar
  17. Old Englishspærstān
  18. Middle Englishsparston
  19. Englishsparstonebf.
  20. Englishspar
  21. Englishfluorspar
  22. Englishfluorescencebf.
  23. Englishfluoresce
  24. Englishfluor(escent)
  25. Latinō
  26. Old Frenchoh
  27. Middle Englisho
  28. EnglishO
  29. Middle Englisho
  30. Englishoh
  31. Englishfluoro
  32. English todayperfluoro

From per- + fluoro.

Etymology from Wiktionary, CC BY-SA 4.0.