keen

nouns

a funeral lament sung with loud wailing
keen
domain region
an island comprising the republic of Ireland and Northern Ireland
Emerald Isle, Hibernia, Ireland
is a type of (narrower)
a song or hymn of mourning composed or performed as a memorial to a dead person
coronach, dirge, lament, requiem, threnody

verbs

express grief verbally
"we lamented the death of the child"
keen, lament

adjectives

having or demonstrating ability to recognize or draw fine distinctions
"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"
acute, discriminating, incisive, keen, knifelike, penetrating, penetrative, piercing, sharp
is derived from
keenness
intense or sharp
"suffered exquisite pain"; "felt exquisite pleasure"
exquisite, keen
very good
"he did a bully job"; "a neat sports car"; "had a great time at the party"; "you look simply smashing"
bang-up, bully, corking, cracking, dandy, great, groovy, keen, neat, nifty, not bad, peachy, slap-up, smashing, swell
painful as if caused by a sharp instrument
"a cutting wind"; "keen winds"; "knifelike cold"; "piercing knifelike pains"; "piercing cold"; "piercing criticism"; "a stabbing pain"; "lancinating pain"
cutting, keen, knifelike, lancinate, lancinating, piercing, stabbing
having a sharp cutting edge or point
"a keen blade"
keen
is derived from
keenness
is similar to
having or made by a thin edge or sharp point; suitable for cutting or piercing
"a sharp knife"; "a pencil with a sharp point"
sharp