7 letters · 10 points in Scrabble
noun a device that provides reactive force when in motion relative to the surrounding air; can lift or control a plane in flight
originEtymology tree Proto-Indo-European *h₂ews- Proto-Indo-European *h₂ewsér Proto-Hellenic *auhḗr Ancient Greek ᾱ̓ήρ (āḗr)bor. Latin āēr Old French airbor. Middle English aire English air English foil English airfoil From air + foil.
Etymology from Wiktionary, CC BY-SA 3.0