Etymology

unprecedented

un·pre·ce·dent·ed
U1N1P3R1E1C3E1D2E1N1T1E1D2

Today it means: Never before seen, done, or experienced; without precedent. Full definition →

English precedent ← 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. Englishprecedent
  9. English todayunprecedented

From un- + precedent + -ed.

Etymology from Wiktionary, CC BY-SA 4.0.