Etymology

unfluorescent

U1N1F4L1U1O1R1E1S1C3E1N1T1

Today it means: Not fluorescent. Full definition →

English fluorescent ← Middle English sparston ← Old English spærstān
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The story

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Germanic*un-
  4. Proto-West Germanic*un-
  5. Old Englishun-
  6. Middle Englishun-
  7. Englishun-
  8. Proto-Indo-European*bʰel-
  9. Proto-Indo-European*bʰlewH-
  10. Proto-Indo-European*bʰluH-yé-ti?
  11. Latinfluō
  12. Latinfluor
  13. Englishfluor
  14. Englishfluorite
  15. Middle Low Germanspar
  16. Old Englishspærstān
  17. Middle Englishsparston
  18. Englishsparstonebf.
  19. Englishspar
  20. Englishfluorspar
  21. Englishfluorescencebf.
  22. Englishfluoresce
  23. Englishfluorescent
  24. English todayunfluorescent

From un- + fluorescent.

Etymology from Wiktionary, CC BY-SA 4.0.