Etymology

unimaginable

U1N1I1M3A1G2I1N1A1B3L1E1

Today it means: Unable to be imagined; inconceivable or mind-boggling; beyond belief. Full definition →

English imagine ← 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. Englishimagine
  9. English todayunimaginable

From un- + imagine + -able.

Etymology from Wiktionary, CC BY-SA 4.0.