Etymology
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woodchuck (n.)
1670s, alteration (influenced by wood (n.)) of Cree (Algonquian) otchek or Ojibwa otchig, "marten," the name subsequently transferred to the groundhog.
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ground-hog (n.)
also groundhog, "American marmot," 1784, from ground (n.) + hog (n.). Also known colloquially as a whistlepig, woodchuck, and compare aardvark. Ground Hog Day as a weather forecasting event is first recorded 1869, in an Ohio newspaper article that calls it "old tradition;" the custom though not the name, attested from 1850s.
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