Etymology

aerofoil

A1E1R1O1F4O1I1L1
English foil ← Ancient Greek ἀέρος (aéros) ← Proto-Hellenic *auhḗr
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The story

  1. Proto-Indo-European*h₂ews-
  2. Proto-Indo-European*h₂ewsér
  3. Proto-Hellenic*auhḗr
  4. Ancient Greekᾱ̓ήρ (āḗr)
  5. Ancient Greekἀέρος (aéros)
  6. Englishaero-
  7. Englishfoil
  8. English todayaerofoil

From aero- + foil.

Etymology from Wiktionary, CC BY-SA 4.0.