Etymology

outside

out·side
O1U1T1S1I1D2E1

Today it means: The part of something that faces out; the outer surface. Full definition →

English side ← Middle English side ← Old English sīde
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The story

  1. Proto-Indo-European*úd
  2. Proto-Germanic*ūt
  3. Proto-West Germanic*ūt
  4. Old Englishūt
  5. Proto-Germanic*ūt
  6. Proto-Germanic*ūtai
  7. Proto-West Germanic*ūtē
  8. Old Englishūte
  9. Middle Englishoute
  10. Englishout
  11. Proto-Indo-European*seh₁-
  12. Proto-Germanic*sīdaz
  13. Proto-Germanic*sīdǭ
  14. Old Englishsīde
  15. Middle Englishside
  16. Englishside
  17. English todayoutside

From out + side.

Etymology from Wiktionary, CC BY-SA 4.0.