Etymology

-ator

Today it means: Used to form agent nouns, usually from verbs that have the ending -ate. Full definition →

Middle English -atour ← Old French -ator ← Latin -ātor, -ātōrem
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The story

  1. Latin · derived from-ātor, -ātōrem
  2. Old French · derived from-ator
  3. Middle English · inherited from-atour
  4. English today-ator

Inherited from Middle English -atour, from Old French -ator and its etymon Latin -ātor, -ātōrem; reinforced by -ate + -or.

Etymology from Wiktionary, CC BY-SA 4.0.