muddy
adjective
Muddy means covered in mud, which is a wet, sticky mixture of dirt and water. It can also describe something that isn't clear or easy to see through.
Example
- My shoes were muddy after playing in the rain.
 - The pond looked muddy because of all the fallen leaves.
 - Her thinking was a bit muddy after not getting enough sleep. It can also describe something that isn't clear or easy to see through.