Definition of slyly adverb from the Oxford Advanced Learner's Dictionary

     

    slyly

     adverb
    adverb
    BrE BrE//ˈslaɪli//
     
    ; NAmE NAmE//ˈslaɪli//
     
     
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  1. 1(disapproving) in a secret or dishonest way, often intending to trick people synonym cunningly Ministers slyly entered into a deal exchanging the prisoner for oil.
  2. 2in a way that suggests that you know something secret that other people do not know synonym knowingly (2) He glanced at her slyly.