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"
... are ready to go on; we shout; our voice is lost in the roar of the torrent. We send the guide. He goes down, and stands doubtfully. He does not know exactly what to do. She hears him, and starts to her feet, pointing with one hand to yonder peak, and with the other to that knifelike edge, that seems cleaving heaven with its keen and glistening cimeter of snow, reminding one of Isaiah's sublime imagery, "For my sword is bathed in heaven." She points at the grizzly rocks, with their ... — Sunny Memories of Foreign Lands V2 • Harriet Beecher Stowe
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