sharpness or cutting ability / astuteness or sagacity / eagerness or enthusiasm

plural of keenness

An English surname from Old English, a variant of Keen. / A surname from Irish, a variant of Keane. / A city, the county seat of Cheshire County, New Hampshire; named for British diplomat Benjamin Keene.

Obsolete form of keen.

simple past tense and past participle of keen

present participle of keen

Sharp, shrill, especially of a sound.

Intense mournful wailing after a death, often at a funeral or wake / (by extension) An unpleasant wailing sound.

(chiefly Commonwealth of Nations) Often with a prepositional phrase, or with to and an infinitive: showing a quick and ardent responsiveness or willingness; eager, enthusiastic, interested.

(intransitive) To utter a keen. / (transitive) To utter with a loud wailing voice or wordless cry. / (transitive) To mourn.