Etymology

haecceity

haec·ce·i·ty
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Today it means: The essence of a particular thing that gives it its unique particularity; those qualities that make an individual this specific individual and not some other. Full definition →

Medieval Latin haecceitas
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The story

  1. Medieval Latin · derived fromhaecceitas“thisness”
  2. English todayhaecceity

From Medieval Latin haecceitas (“thisness”) coined by Duns Scotus (from haec (“this, these”)) + -ity.

Etymology from Wiktionary, CC BY-SA 4.0.