Etymology

eleventh

e·lev·enth
E1L1E1V4E1N1T1H4

Today it means: The ordinal form of the number eleven. Full definition →

Middle English elleventhe ← Old English endlefta ← Proto-Germanic *ainaliftô
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The story

  1. Proto-Germanic · inherited from*ainaliftô
  2. Old English · inherited fromendlefta
  3. Middle English · inherited fromelleventhe
  4. English todayeleventh

From Middle English elleventhe, from elleven + -the, equivalent to eleven + -th. This re-formation replaced inherited forms such as ellefte, enlefte, from Old English endlefta, from Proto-Germanic *ainaliftô.

Etymology from Wiktionary, CC BY-SA 4.0.