Etymology

idio-

Today it means: individuality, peculiarity, separateness. Full definition →

Ancient Greek ῐ̓́δῐος (ĭ́dĭos) ← Proto-Hellenic *hwédios ← Proto-Indo-European *swéd-yo-s
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The story

  1. Proto-Indo-European*swé
  2. Proto-Indo-European*swéd-yo-s
  3. Proto-Hellenic*hwédios
  4. Ancient Greekῐ̓́δῐος (ĭ́dĭos)
  5. English todayidio-

Representing a combining form of Ancient Greek ἴδιος (ídios, “own, personal, distinct”). By surface analysis, idi- + -o-. Unrelated to ideo-.

Etymology from Wiktionary, CC BY-SA 4.0.