keen

Adjective

• having a sharp cutting edge or point
  • a keen blade
    

• 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
    

• very good
  • he did a bully job
    
  • a neat sports car
    
  • had a great time at the party
    
  • you look simply smashing
    

• intense or sharp
  • suffered exquisite pain
    
  • felt exquisite pleasure
    

• 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
    

Noun

• a funeral lament sung with loud wailing

Verb

• express grief verbally
  • we lamented the death of the child
    

Related words

• Synonyms: 
  cutting , knifelike , piercing , stabbing , lancinate , lancinating , exquisite , acute , discriminating , incisive , penetrating , penetrative , sharp , lament