shady in WordNet English dictionary

1. 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"
   fishy  funny  shady  suspect  suspicious 
   
2. (of businesses and businessmen) unscrupulous
   "a shady operation"
   fly-by-night  shady 
   
3. of questionable taste or morality
   "a louche nightclub"; "a louche painting"
   louche  shady 
   
4. 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"
   shady  shadowed  shadowy  umbrageous