murky

Dark, dim, or cloudy, making it difficult to see through or into clearly.

• The divers struggled to find the sunken boat in the murky water.

• Why is the pond so murky this afternoon?

Unclear, obscure, or complicated, especially with an implication of secrecy or dishonesty.

• The company's finances remained murky despite the external audit.

• Investigators uncovered a murky scheme involving offshore shell companies.