Antonyms of adj perspicacious

2 senses of perspicacious

Sense 1
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")

INDIRECT (VIA wise) -> foolish -- (devoid of good sense or judgment; "foolish remarks"; "a foolish decision")

Sense 2
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")

INDIRECT (VIA discerning) -> undiscerning -- (lacking discernment)

Similarity of adj perspicacious

2 senses of perspicacious

Sense 1
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")
       => wise (vs. foolish) -- (having or prompted by wisdom or discernment; "a wise leader"; "a wise and perceptive comment")

Sense 2
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")
       => discerning (vs. undiscerning) -- (having or revealing keen insight and good judgment; "a discerning critic"; "a discerning reader")