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")
sagacious -- (skillful in statecraft or management; "an astute and sagacious statesman")
(Sound)
