shadiness in WordNet English dictionary

1. relative darkness caused by light rays being intercepted by an opaque body
   "it is much cooler in the shade"; "there's too much shadiness to take good photographs"
   shade  shadiness  shadowiness 
   
2. of questionable honesty or legality
   "they acted with such obvious shadiness that they were instantly recognizable"; "the shadiness of their transactions"
   shadiness