shadowy in WordNet English dictionary

1. lacking clarity or distinctness
   "a dim figure in the distance"; "only a faint recollection"; "shadowy figures in the gloom"; "saw a vague outline of a building through the fog"; "a few wispy memories of childhood"
   dim  faint  shadowy  vague  wispy 
   
2. 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 
   
3. lacking in substance
   "strange fancies of unreal and shadowy worlds"- W.A.Butler; "dim shadowy forms"; "a wraithlike column of smoke"
   shadowy  wraithlike