whetten

Etymology
From.

Verb

 * 1)  To whet.

Etymology
, from, from.

Verb

 * 1) To sharpen; to make sharp, especially with a whetstone.
 * 2) To sharpen one's claws or tusks; to prepare for attack.
 * 3) To motivate; to encourage or cause eagerness.
 * 4)  To stimulate or increase endurance.
 * 5)  To growl or groan; to make hostile noises.
 * 6)  To grind against something.