perspicacity

"I understand," I said. "The fact is that you have the money." His face brightened. He seemed pleased at my perspicacity.

His very veneration for his father-in-law, combined as it is with a total want of the most ordinary perspicacity, is an additional disqualification.

Attentive consideration of the phenomena of vision has led to the invention of artificial aids by which the sight may be wonderfully strengthened and preserved, and man endowed at once with the perspicacity of the eagle or the minute scrutiny of the insect.