1.Definition: having or demonstrating ability to recognize or draw fine distinctions

Related Adjective(s):acute, discriminating, incisive, keen, knifelike, penetrating, penetrative, sharp

2.Definition: painful as if caused by a sharp instrument

"Piercing knifelike pains", "Piercing cold", "Piercing criticism"

Related Adjective(s):cutting, keen, knifelike, lancinate, lancinating, stabbing