Etymology

onesies

O1N1E1S1I1E1S1

Today it means: A call in any children's game, such as jacks, where one action must be performed. Full definition →

English one ← Middle English on ← Old English ān
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The story

  1. Proto-Indo-European*ís?
  2. Proto-Indo-European*h₁óynos
  3. Proto-Germanic*ainaz
  4. Proto-West Germanic*ain
  5. Old Englishān
  6. Middle Englishon
  7. Englishone
  8. English todayonesies

From one + -sies.

Etymology from Wiktionary, CC BY-SA 4.0.