Get the FREE one-click dictionary software for Windows
or the iPhone/iPad and Android apps
Adjective: sly (slyer,slyest,slier,sliest)  slI
  1. Marked by skill in deception
    "sly as a fox";
    - crafty, cunning, dodgy [Brit, informal], foxy, guileful, knavish, tricksy, tricky, wily

Derived forms: slyer, slyest, slier, sliest

See also: artful

Encyclopedia: Sly, William