K

adj. Sharp; having a fine edge or point; as, a keen razor, or a razor with a keen edge. Acute of mind; sharp; penetrating; having or expressing mental acuteness; as, a man of keen understanding; a keen look; keen features. Bitter; piercing; acrimonious; cutting; stinging; severe; as, keen satire or sarcasm. Piercing; penetrating; cutting; sharp; - applied to cold, wind, etc.; as, a keen wind; the cold is very keen. Eager; vehement; fierce; as, a keen appetite. Keen is often used in the composition of words, most of which are of obvious signification; as, keen-edged, keen-eyed, keen-sighted, keen-witted, etc.

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