濁す
1
to make muddy (of a liquid);to make cloudy;to make turbid;to roil
水面から飛び立つ鳥は努めてあとを濁さぬようにする。
A bird flying out of the water is careful not to cause turbulence.
2
to make ambiguous;to evade (e.g. the point);to be noncommittal about
See also:
言葉を濁す (ことばをにごす)