1. acute
2. discriminating, incisive, knifelike, penetrating, penetrative, piercing, sharp, perceptive, exquisite
3. intense, incisive
4. sharp, intelligent, bang-up
5. bully, corking, cracking, dandy, great, groovy, neat, nifty, not bad, peachy, slap-up, swell, smashing, good, cutting
6. knifelike, piercing, stabbing, lancinate, lancinating, sharp, sharp

1. dirge

1. coronach, lament, requiem, threnody, lament
1. express emotion, express feelings