noun (n)

• relative darkness caused by light rays being intercepted by an opaque body(noun.state)

  Example:
  There's too much shadiness to take good photographs.
  

  Synonym:
  shade, shadowiness
  

  source: wordnet30
• of questionable honesty or legality(noun.attribute)

  Example:
  They acted with such obvious shadiness that they were instantly recognizable.
  The shadiness of their transactions.
  

  source: wordnet30
• Quality or state of being shady.(noun)

  source: webster1913