Wary is a related term of perspicacious.
As adjectives the difference between wary and perspicacious
is that
wary is cautious of danger; carefully watching and guarding against deception, artifices, and dangers; timorously or suspiciously prudent; circumspect; scrupulous; careful while
perspicacious is (figuratively) of acute discernment; having keen insight; mentally perceptive.