Sagacious a. : Of quick sense perceptions; keen-scented; skilled in following a trail.

Sagacious a. : Hence, of quick intellectual perceptions; of keen penetration and judgment; discerning and judicious; knowing; far-sighted; shrewd; sage; wise; as, a sagacious man; a sagacious remark.

Example:
When you start to feel Sagacious and dangerously powerful, how do you keep your cool and manage to stay there?

Taxonomy
Merriam-Webster Online Dictionary, Dictionary, cious, webster, Latin, keen, Word Games, Webster Online Dictionary with audio pronunciations, thesaurus, glossary, english, language, ESL, Search, adjective, Etymology, sagax, sagus.

Defination from the web:
sagacious from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word games. ... and judgment : discerning <sagacious judge of character> b : caused by or indicating acute discernment <sagacious purchase of stock> ...