Etymology

one's

Today it means: Belonging to one. Full definition →

Middle English ones
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one's · determiner1

  1. Middle English · inherited fromones
  2. English todayone's

From Middle English ones, equivalent to one + -'s.

one's · contraction2

Contraction of one + is, equivalent to one + 's.

Words from the same roots

Middle Englishones all →

once

Etymology from Wiktionary, CC BY-SA 4.0.