Etymology

unendurable

U1N1E1N1D2U1R1A1B3L1E1

Today it means: Not to be endured; intolerable. Full definition →

English endurable ← Middle English enduren ← Old French endurer
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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. Latinindūrō
  9. Latinindūrāre
  10. Old Frenchendurer
  11. Middle Englishenduren
  12. Englishendure
  13. Englishendurable
  14. English todayunendurable

From un- + endurable.

Etymology from Wiktionary, CC BY-SA 4.0.