What is the meaning of Keen?

Often with a prepositional phrase, or with to and an infinitive: showing a quick and ardent responsiveness or willingness; eager, enthusiastic, interested.

Fierce, intense, vehement.

Having a fine edge or point; sharp.

Acute of mind, having or expressing mental acuteness; penetrating, sharp.

Acrimonious, bitter, piercing.

Of cold, wind, etc.: cutting, penetrating, piercing, sharp.

Of prices, extremely low as to be competitive.

Marvelous.

Brave, courageous; audacious, bold.

To make cold, to sharpen.

A prolonged wail for a deceased person.

To utter a keen.

To utter with a loud wailing voice or wordless cry.

To mourn.

genitive plural of ke

no, not a, not any

no, not any, not a

you, thou (second-person singular pronoun)

sharp

no, not any, not a

bring

Source: wiktionary.org