Adjective perspicacious 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)
- clear-eyed, clear-sighted, perspicacious - mentally acute or penetratingly discerning; "too clear-eyed not to see what problems would follow"; "chaos could be prevented only by clear-sighted leadership"; "much too perspicacious to be taken in by so spurious an argument"
Antonym: undiscerning (indirect, via discerning)
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