Etymology

unachievable

U1N1A1C3H4I1E1V4A1B3L1E1

Today it means: That cannot be achieved (or only with great difficulty). Full definition →

English achievable ← Middle English achieven ← 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. Middle Englishachieven
  9. Englishachieve
  10. Englishachievable
  11. English todayunachievable

From un- + achievable.

Etymology from Wiktionary, CC BY-SA 4.0.