noun-modifying (irregular)
perfectly clear; crystal clear; limpid
Describes something completely clear and transparent, often used for water, air, sky, or sounds. Also used figuratively for a pure, unclouded state of mind or feeling.
A perfectly clear blue sky stretches out.
The lake water is crystal clear, and you can see all the way to the bottom.
Her clear, pure voice resonated through the hall.
Standard kanji spelling; the kanji 澄 conveys clarity and purity.
Mixed kanji-kana spelling, also common.
Compound of 澄み (continuative form of 澄む 'to become clear') + 切る (here as an auxiliary verb meaning 'to do completely').