Having or demonstrating ability to recognize or draw fine distinctions. Synonyms:acute, discriminating, incisive, keen, penetrating, penetrative, piercing, sharp."Incisive comments" , "Icy knifelike reasoning" , "As sharp and incisive as the stroke of a fang" , "Penetrating insight" , "Frequent penetrative observations"
3.
Painful as if caused by a sharp instrument. Synonyms:cutting, keen, lancinate, lancinating, piercing, stabbing."Keen winds" , "Knifelike cold" , "Piercing knifelike pains" , "Piercing cold" , "Piercing criticism" , "A stabbing pain" , "Lancinating pain"