incisive

Adjective

• suitable for cutting or piercing
  • incisive teeth
    

• 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
    

Related words

• Synonyms: 
  acute , discriminating , keen , knifelike , penetrating , penetrative , piercing , sharp