Etymology

synesthesia

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English syn- ← Ancient Greek σῠν- (sŭn-) ← Proto-Hellenic *ksún
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The story

  1. Proto-Indo-European*ḱe?
  2. Proto-Indo-European*ḱómder.?
  3. Proto-Indo-European*sem-der.?
  4. Proto-Hellenic*ksún
  5. Ancient Greekσύν (sún)
  6. Ancient Greekσῠν- (sŭn-)
  7. Englishsyn-
  8. English todaysynesthesia

From syn- + -esthesia.

Etymology from Wiktionary, CC BY-SA 4.0.