noun (n)

• an atmosphere in which visibility is reduced because of a cloud of some substance(noun.state)

  Synonym:
  fog, fogginess, murk
  

  source: wordnet30
• the quality of being cloudy(noun.attribute)

  Synonym:
  cloudiness, muddiness
  

  source: wordnet30
• The state of being murky.(noun)

  source: webster1913