#4: Sagacious

Definition:

having or showing an ability to understand difficult ideas and situations and to make good decisions

Example:

"[New England Patriots offensive coordinator Josh] McDaniels, a native of Ohio, is praised as a sagacious play-caller and offensive mind and warrants a second turn as a head coach at 37." — The Sports XChange, Hartford Courant, December 31, 2013

About the Word:

The earliest, 17th century sense of sagacious was applied to people (or animals): "quick or keen in sense perceptions." Over time, the meaning of the word shifted and became high praise for the human intellect.