keen

(noun) a funeral lament sung with loud wailing.

(verb) express grief verbally. Synonyms: lament. Example: "We lamented the death of the child."

(adj) having or demonstrating ability to recognize or draw fine distinctions. Synonyms: acute, discriminating, incisive, knifelike, penetrating, penetrative, piercing, sharp. Examples: "An acute observer of politics and politicians." "Incisive comments." "Icy knifelike reasoning." "As sharp and incisive as the stroke of a fang." "Penetrating insight." "Frequent penetrative observations."

(adj) intense or sharp. Synonyms: exquisite. Examples: "Suffered exquisite pain." "Felt exquisite pleasure."

(adj) very good. Synonyms: bang-up, bully, corking, cracking, dandy, great, groovy, neat, nifty, not bad(predicate), peachy, slap-up, swell, smashing. Examples: "He did a bully job." "A neat sports car." "Had a great time at the party." "You look simply smashing."

(adj) painful as if caused by a sharp instrument. Synonyms: cutting, knifelike, piercing, stabbing, lancinate, lancinating. Examples: "A cutting wind." "Keen winds." "Knifelike cold." "Piercing knifelike pains." "Piercing cold." "Piercing criticism." "A stabbing pain." "Lancinating pain."

(adj) having a sharp cutting edge or point. Example: "A keen blade."