Etymology

introvert

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Today it means: An organ or other body part that is or can be turned inside out, especially an anterior portion of some annelid worms capable of retraction. Full definition →

Latin intrōvertere
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The story

  1. Latin · derived fromintrōvertere
  2. English todayintrovert

From New Latin intrōvertere, from intro- (“within”) and vertere (“to turn”). Popularized as a psychological term by the German works of Carl Jung. By surface analysis, intro- + -vert.

Etymology from Wiktionary, CC BY-SA 4.0.