Etymology

punctilious

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Today it means: Strictly attentive to detail; meticulous or fastidious, particularly to codes or conventions. Full definition →

Proto-Indo-European *h₃édosder.? ← English punctilio
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The story

  1. Englishpunctilio
  2. Proto-Indo-European*h₃ed-
  3. Proto-Indo-European*h₃édosder.?
  4. English todaypunctilious

From punctilio (“fine point in exactness of conduct”) + -ous.

Etymology from Wiktionary, CC BY-SA 4.0.