Keen /(kēn)/

Keen

a.
  1. Sharp; having a fine edge or point; as, a keen razor, or a razor with a keen edge.
    A bow he bare and arwes [arrows] bright and kene.
    That my keen knife see not the wound it makes.
  2. Acute of mind; sharp; penetrating; having or expressing mental acuteness; as, a man of keen understanding; a keen look; keen features.
    To make our wits more keen.
    Before the keen inquiry of her thought.
  3. Bitter; piercing; acrimonious; cutting; stinging; severe; as, keen satire or sarcasm.
    Good father cardinal, cry thou amen To my keen curses.
  4. Piercing; penetrating; cutting; sharp; -- applied to cold, wind, etc.; as, a keen wind; the cold is very keen.
    Breasts the keen air, and carols as he goes.
  5. Eager; vehement; fierce; as, a keen appetite.
    So keen and greedy to confound a man.
  6. Wonderful; delightful; marvelous; as, that would be keen. [slang]

Keen

v. t.
  1. To sharpen; to make cold. [R.]
    Cold winter keens the brightening flood.

Keen

n.
  1. A prolonged wail for a deceased person. Cf. Coranach. [Ireland]

Keen

v. i.
  1. To wail as a keener does. [Ireland]