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Synonyms of sly in English:


  • 1 she's getting sly in her old age
    informalfoxy, shifty
    British informalfly
    Australian/New Zealand informalshonky
    South African informalslim
    [Antonyms] honest, artless
  • 2 he gave her a sly grin
    roguish, mischievous, impish, puckish, playful, teasing, naughty, wicked, waggish;
    Scottish & Northern English informalpawky
  • 3 she took a sly sip of water
  • noun

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    on the sly

    is she meeting some other guy on the sly?
    [Antonyms] openly
    informalon the q.t.

    Definition of sly in:

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