濁る にごる to become muddy; to become cloudy; to get impure (of a liquid, gas, etc.) v5r vi to become dull (of a sound, color, etc.); to become hoarse v5r vi to become impure (of a heart, society, etc.); to be corrupted; to be polluted v5r vi to become voiced; to add voiced consonant marks v5r vi ling Intermediate ➥
飛ぶ鳥跡を濁さず とぶとりあとをにごさず it is simply common courtesy to clean up after yourself; a bird does not foul the nest it is about to leave; on leaving a place one should see that all is in good order exp proverb Advanced ➥