- perspicacious, sagacious, sapient - acutely insightful and wise; "much too perspicacious to be taken in by such a spurious argument"; "observant and thoughtful, he was given to asking sagacious questions"; "a source of valuable insights and sapient advice to educators"
Antonym: foolish (indirect, via wise)
- sagacious - skillful in statecraft or management; "an astute and sagacious statesman"
Antonym: impolitic (indirect, via politic)