cannier
  精明的,不易受騙的,謹慎的,靈敏的,小心的 (比較級)
  canny
       adj : showing self-interest and shrewdness in dealing with others;
             "a cagey lawyer"; "too clever to be sound" [syn: cagey,
              cagy, clever]
       [also: canniest, cannier]