Etymology

unopenable

U1N1O1P3E1N1A1B3L1E1

Today it means: That cannot be opened. Full definition →

English openable ← Middle English open ← Old English open
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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*upó
  9. Proto-Germanic*ub
  10. Proto-Germanic*upp
  11. Proto-Germanic*upanaz
  12. Proto-West Germanic*opan
  13. Old Englishopen
  14. Middle Englishopen
  15. Englishopen
  16. Englishopenable
  17. English todayunopenable

From un- + openable.

Etymology from Wiktionary, CC BY-SA 4.0.