Etymology

stimulatory

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Today it means: stimulative; serving to stimulate Full definition →

English stimulate ← Latin stimulatus ← Proto-Indo-European *(s)tey-?
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The story

  1. Proto-Indo-European*(s)tey-?
  2. Latinstimulus
  3. Latinstimulo
  4. Latinstimulatus
  5. Englishstimulate
  6. English todaystimulatory

From stimulate + -ory.

Etymology from Wiktionary, CC BY-SA 4.0.