murk 
/ˈmɚk/ noun
/ˈmɚk/ noun [noncount] : darkness or fog that is hard to see through
▪ A figure emerged from the murk. [=gloom] ; also : dark or dirty water
▪ We could not see the bottom of the lake through the murk.
▪ A figure emerged from the murk. [=gloom] ; also : dark or dirty water
▪ We could not see the bottom of the lake through the murk.
