Etymology

eosophobia

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Today it means: A morbid fear of dawn or daylight. Full definition →

Ancient Greek ἠώς (ēṓs) ← Proto-Hellenic *auhṓs ← Proto-Indo-European *h₂éwsōs
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The story

  1. Proto-Indo-European*h₂ews-
  2. Proto-Indo-European*h₂éwsōs
  3. Proto-Hellenic*auhṓs
  4. Ancient Greekἠώς (ēṓs)
  5. English todayeosophobia

From Ancient Greek ἠώς (ēṓs, “dawn”) + English -phobia.

Etymology from Wiktionary, CC BY-SA 4.0.