"incisive" in the adjective sense

1. acute, discriminating, incisive, keen, knifelike, penetrating, penetrative, piercing, sharp

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"

2. incisive

suitable for cutting or piercing

"incisive teeth"

Source: WordNet® (An amazing lexical database of English)

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