WordNet sense 1 (having or demonstrating ability to recognize or draw fine distinctions):

acute, discriminating, incisive, penetrating, penetrative, piercing, knifelike

WordNet sense 2 (having the ability to perceive or understand; keen in discernment):

perceptive

WordNet sense 3 (express grief verbally):

lament

WordNet sense 4 (intense or sharp):

exquisite

WordNet sense 5 (in an extreme degree):

intense

WordNet sense 6 (very good):

bully, dandy, great, groovy, neat, nifty, peachy, smashing, swell, corking, cracking, slap-up, bang-up, not bad

WordNet sense 7 (having desirable or positive qualities especially those suitable for a thing specified):

good

WordNet sense 8 (as physically painful as if caused by a sharp instrument):

cutting, stabbing, lancinate, lancinating

WordNet sense 9 (keenly and painfully felt; as if caused by a sharp edge or point):

sharp