The air . . . sharpened his visual ray To objects
distant far. --Milton.
He that wrestles with us strengthens our nerves and
sharpens our skill. --Burke.
(c) To make more eager; as, to sharpen men's desires.
Epicurean cooks Sharpen with cloyless sauce his
appetite. --Shak.
(d) To make more pungent and intense; as, to sharpen a pain
or disease.
(e) To make biting, sarcastic, or severe. ``Sharpen each
word.'' --E. Smith.
(f) To render more shrill or piercing.
Inclosures not only preserve sound, but increase
and sharpen it. --Bacon.
(g) To make more tart or acid; to make sour; as, the rays of
the sun sharpen vinegar.
(h) (Mus.) To raise, as a sound, by means of a sharp; to
apply a sharp to.