Synonym of MURKY

Answer: Option C

Ugly : unpleasant or repulsive, especially in appearance.
Dishonest : behaving or prone to behave in an untrustworthy, deceitful, or insincere way.
Dull : lacking brightness, vividness, or sheen.
Lazy : unwilling to work or use energy.
Murky : dark and gloomy, especially due to thick mist.

Synonym of Murky is Dull