œil m (plural yeux or œils)
From Old French ueil.
œil m (plural yeulx)
From Middle French œil, from Old French oil, uel, ueil (plural olz, ialz), from Vulgar Latin oclus, from Latin oculus, from Proto-Italic *okelos, ultimately from Proto-Indo-European *h₃okʷ-, *h₃ekʷ- (“eye; to see”).