Etymology

CM

C3M3

Today it means: A member of the Order of Canada. Full definition →

Japanese CM ← English commercial
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The story

  1. English · derived fromcommercial
  2. Japanese · borrowed fromCM“commercial video ad”
  3. English todayCM

Sense "commercial" is a borrowing from Japanese CM (CM, “commercial video ad”), from English commercial + message.

Etymology from Wiktionary, CC BY-SA 4.0.