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sagacious
Adjectivesagacious has 2 senses
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)