澄む

1. Origins, structure, and basic meaning

• Structure: The written form is 澄む, read すむ. This intransitive verb describes clarity, including air becoming clear and a voice sounding pure and distinct.
• Basic usage: 空気が澄む describes the air clearing after rain, while 澄んだ声 describes a clear voice resonating through a hall.

2. Common pitfalls and similar expressions

• Air cleared after rain
  • Clear post-rain air makes distant mountains visible. Example: 雨上がりの空気が澄んで、遠くの山まで見えました。 — The air cleared after the rain, and we could see the distant mountains.
• A clear voice in a quiet hall
  • Her clear voice resonates through the quiet hall. Example: 彼女の澄んだ声が静かな会場に響きました。 — Her clear voice filled the quiet hall.