covered with (large drops etc of)

dark and cloudy

(of eyes) tired and so not able to see well

blurry

not bright; not (to be) seen clearly; not clear

darkish

(of things known by the senses) weak; not clear

having little effect on senses

misty

cloudy

(of speech) not clear or distinct; not jointed

unable to speak well

not distinct

obscure, ambiguous

(to cause something) to become covered with mist

filmy, obscure

full of, covered with, mud

dark and cloudy

not allowing light to pass through; that cannot be seen through

clouded, muddy

impossible to recognize

indistinct

not clear or distinct; slight; (of a person, expression, behaviour) uncertain, especially about details

not definite or clear