Etymology

megathrust

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Today it means: A sudden large-scale slip along a fault between a subducting and an overriding plate, resulting in a major earthquake. Full definition →

English thrust ← Ancient Greek μέγᾰς (mégăs) ← Proto-Hellenic *mégas
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The story

  1. Proto-Indo-European*méǵh₂s
  2. Proto-Hellenic*mégas
  3. Ancient Greekμέγᾰς (mégăs)
  4. Englishmega-
  5. Englishthrust
  6. English todaymegathrust

From mega- + thrust.

Etymology from Wiktionary, CC BY-SA 4.0.