perspicacious
1. [ adjective ] acutely insightful and wise
Synonyms: sagacious sapient
Examples:

"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"

Related terms: wise
2. [ adjective ] mentally acute or penetratingly discerning
Synonyms: clear-sighted clear-eyed
Examples:

"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"

Related terms: discerning
Similar spelling:   perspicuous
  perspicacity
  perspicuously
  perspicuousness
  perspicuity
  perspiring