Etymology

watchdog

W4A1T1C3H4D2O1G2

Today it means: A guard dog. Full definition →

English dog ← Middle English dogge ← Old English *dogga
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The story

  1. Old Englishwæċċan
  2. Middle Englishwacchen
  3. Englishwatch
  4. Old English*dogga
  5. Middle Englishdogge
  6. Englishdog
  7. English todaywatchdog

From watch + dog.

Etymology from Wiktionary, CC BY-SA 4.0.