Etymology

unarduous

U1N1A1R1D2U1O1U1S1

Today it means: Not arduous. Full definition →

English arduous ← Latin arduus ← Middle 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. Latinarduus
  9. Englisharduous
  10. English todayunarduous

From un- + arduous.

Etymology from Wiktionary, CC BY-SA 4.0.