Etymology

unimpeachable

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Today it means: Not able to be impeached or reproached. Full definition →

English impeachable ← 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. Englishimpeach
  9. Englishimpeachable
  10. English todayunimpeachable

From un- + impeachable.

Etymology from Wiktionary, CC BY-SA 4.0.