濁る

1. Origins, structure, and basic meaning

• Structure: 濁る, read にごる, describes water or sound losing its clear quality.
• Basic usage: In 大雨の後は、川の水が茶色く濁る。, the river water turns muddy brown after heavy rain.

2. Common pitfalls and similar expressions

• Intransitive use
  • が marks what becomes unclear, as in 川の水が and 声が. 声が濁って describes a voice losing its clear tone.