Italian word occhio comes from Proto-Indo-European *h₃ekʷ-, and later Proto-Italic *okʷelos (Eye.)
*h₃ekʷ- (Proto-Indo-European)
eye, eye, to see, to see, eye; to see
*okelos (Proto-Italic)
*h₃okʷih₁ (Proto-Indo-European)
*okʷelos (Proto-Italic)
Eye.
oculum (Latin)
oclus (Latin)
(Vulgar Latin) ("eye").
oclum (Vulgar Latin)
occhio (Italian)
Beware!. Look out! watch out!. Mind! Eye.