1. dark and difficult to see through; cloudy or muddy
2. unclear, vague, or confusing
3. morally questionable or suspicious

Examples

• The pond water was murky after the storm.
• She peered through the murky fog trying to find her way.
• The details of the contract remain murky.
• His explanation was murky and hard to follow.
• The politician’s murky past came to light during the campaign.
• They were involved in some murky business dealings.
• The murky depths of the lake concealed many secrets.