/ ˈmɜːki; NAmE ˈmɜːrki/ adjective ( murk·ier , murki·est )
1.
( of a liquid ) not clear; dark or dirty with mud or another substance
SYN cloudy :
She gazed into the murky depths of the water.
2.
( of air, light, etc. ) dark and unpleasant because of smoke, fog , etc. :
a murky night
3.
( disapproving or humorous ) ( of people's actions or character ) not clearly known and suspected of not being honest :
He had a somewhat murky past.
the murky world of arms dealing