Помутнеть

объектив помутнел — lens is cloudy
зеркало помутнело — the looking-glass misted up
помутневшие глаза — dull eyes
пруд помутнел от дождя — pond was turbid with rain
пруд помутнел от дождя — the pond was turbid with rain

Вёсла взболтали ил, и вода помутнела.
The oars had churned up the mud, clouding the water.

Вода помутнела, и дна реки я больше разглядеть не мог.
The water clouded and I could no longer see the river bed.