| adjective | having or demonstrating ability to recognize or draw fine distinctions “an acute observer of politics and politicians” |
| adjective | tending to penetrate; having the power of entering or piercing “a toxic penetrative spray applied to the surface” |
| acuteness | noun | a quick and penetrating intelligence |
| incisiveness | noun | keenness and forcefulness of thought or expression or intellect |
| keenness | noun | a quick and penetrating intelligence |
| penetrate | verb | come to understand |
| sharpness | noun | a quick and penetrating intelligence |