Etymology

mountainous

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Today it means: Having many mountains; characterized by mountains; of the nature of a mountain; rough (terrain); rocky. Full definition →

Middle French montagneux ← Late Latin montāniōsus ← Latin montem
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The story

  1. Latin · derived frommontem“mountain”
  2. Late Latin · derived frommontāniōsus
  3. Middle French · borrowed frommontagneux
  4. English todaymountainous

From mountain + -ous after Middle French montagneux, from Late Latin montāniōsus, from montānia, from Latin montem (“mountain”).

Words from the same roots

Latinmontem all →

mountainmountMontalvo

Etymology from Wiktionary, CC BY-SA 4.0.