Etymology

hydrogeology

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Today it means: The geology of groundwater, especially concerning the physical, biological and chemical properties of its occurrence and movement. Full definition →

English geology ← Ancient Greek ῠ̔δρο- (hŭdro-) ← Proto-Hellenic *údōr
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The story

  1. Proto-Indo-European*wed-
  2. Proto-Indo-European*wódr̥
  3. Proto-Hellenic*údōr
  4. Ancient Greekῡ̆̔́δωρ (hū̆́dōr)
  5. Ancient Greekῠ̔δρο- (hŭdro-)
  6. Englishhydro-
  7. Englishgeology
  8. English todayhydrogeology

From hydro- + geology.

Etymology from Wiktionary, CC BY-SA 4.0.