Etymology

occlusion

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Today it means: The process of occluding, or something that occludes. Full definition →

Late Latin occlūsiō, occlūsiōnis ← Latin occlūdō
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The story

  1. Latin · derived fromocclūdō“to shut up or close up; to restrain”
  2. Late Latin · borrowed fromocclūsiō, occlūsiōnis“occluding, obstruction”
  3. English todayocclusion

Borrowed from Late Latin occlūsiō, occlūsiōnis (“occluding, obstruction”), from the Classical Latin occlūdō (“to shut up or close up; to restrain”), from ob + claudō (“to shut or close”).

Etymology from Wiktionary, CC BY-SA 4.0.