godan verb (-su), transitive verb
make muddy; make cloudy; roil
Physical sense: stirring up sediment in a liquid, making it unclear or turbid.
川の水を濁さないように静かに歩いた。
I walked quietly so as not to muddy the river water.
金魚の水槽を掃除したら、水
When I cleaned the goldfish tank, I ended up making the water cloudy.
godan verb (-su), transitive verb
make ambiguous; evade the point; be noncommittal
Figurative use, often in the phrase 言葉を濁す (to be vague or equivocate). Used when someone avoids giving a clear answer.
See also: 言葉を濁す
彼は都合が悪くなると、いつも言葉を濁す。
He always equivocates when things get awkward.
質問に直接答えず、言葉を濁してごまかした。
He didn't answer the question directly; he evaded it by being vague.