Answer: murkiest

AnswerCrossword Clue
MURKIESTLeast distinct
MURKIESTOf minimum clarity
MURKIESTLeast clear
murkiestMURKY, dark, also MIRKY
murkiest(of liquid) Dark and dirty; not clear
murkiestNot fully explained or understood, esp. with concealed dishonesty or immorality
murkiestDark and gloomy, esp. due to thick mist