Etymology

prosopagnosia

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Today it means: A form of visual agnosia characterized by difficulty with face recognition despite intact low-level visual processing. Full definition →

German Prosopagnosie ← Ancient Greek ἀγνωσία (agnōsía) ← Proto-Indo-European *ǵneh₃-
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The story

  1. Ancient Greekπρόσωπον (prósōpon)
  2. Proto-Indo-European*né
  3. Proto-Indo-European*n̥-
  4. Proto-Hellenic*ə-
  5. Ancient Greekᾰ̓- (ă-)
  6. Proto-Indo-European*ǵneh₃-
  7. Ancient Greek[Term?]
  8. Ancient Greekἀγνώς (agnṓs)
  9. Ancient Greekἀγνωσία (agnōsía)
  10. GermanAgnosie
  11. GermanProsopagnosie
  12. English todayprosopagnosia

Borrowed from German Prosopagnosie (see there for more). By surface analysis, prosop- + agnosia.

Etymology from Wiktionary, CC BY-SA 4.0.