Etymology

unimprovable

U1N1I1M3P3R1O1V4A1B3L1E1

Today it means: Not capable of being improved. Full definition →

English improvable ← Middle English un- ← Old English un-
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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. Englishimprove
  9. Englishimprovable
  10. English todayunimprovable

From un- + improvable.

Etymology from Wiktionary, CC BY-SA 4.0.