濁る【にごる】
to become muddy, to become cloudy, to become turbid, to become impure (of a liquid or gas), to become dull (of a sound, color, etc.), to become indistinct, to become fuzzy, to become hoarse, to become impure (of one's heart, a society, etc.), to be corrupted, to be polluted, to become voiced (of a consonant), to be pronounced as a voiced sound
濁す【にごす】
to make muddy (of a liquid), to make cloudy, to make turbid, to roil, to make ambiguous, to evade (e.g. the point), to be noncommittal about
濁流【だくりゅう】
muddy stream
汚濁【おだく】
pollution, contamination, corruption, graft
濁り【にごり】
muddiness, murkiness, cloudiness, unclearness, impurity (of the world, one's heart, etc.), dakuten (diacritic indicating a voiced consonant), unrefined sake