Adjective shady has 4 senses
  1. fly-by-night, shady - of businesses and businessmen; "a fly-by-night operation"
    Antonyms: trustworthy, trusty (indirect, via untrustworthy)
  2. louche, shady - of questionable taste or morality; "a louche nightclub"; "a louche painting"
    Antonym: reputable (indirect, via disreputable)
  3. fishy, funny, queer, shady, suspect, suspicious - not as expected; "there was something fishy about the accident"; "up to some funny business"; "some definitely queer goings-on"; "a shady deal"; "her motives were suspect"; "suspicious behavior"
    Antonym: unquestionable (indirect, via questionable)
  4. shady, shadowed, shadowy, umbrageous - filled with shade; "the shady side of the street"; "the surface of the pond is dark and shadowed"; "we sat on rocks in a shadowy cove"; "cool umbrageous woodlands"
    Antonym: unshaded (indirect, via shaded)
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