murkiness

from WordNet (r) 3.0 (2006)

murkiness
    n 1: an atmosphere in which visibility is reduced because of a
         cloud of some substance [syn: {fog}, {fogginess}, {murk},
         {murkiness}]
    2: the quality of being cloudy [syn: {cloudiness}, {murkiness},
       {muddiness}]

from The Collaborative International Dictionary of English v.0.48

Murkiness \Murk"i*ness\, n.
   The state of being murky.
   [1913 Webster]