KanjiJLPT N2
Pure

pure, purify, cleanse, exorcise, Manchu dynasty

Mnemonic

After a storm passes, the sky turns blue—the deepest, clearest blue you've ever seen. The air feels pure, every speck of dust washed away by rain. You breathe deeply, completely refreshed. That post-storm blue is the purest sight imaginable.
Additional thoughts
Picture standing outside right after a violent storm. Rain has scrubbed everything clean and the sky is an impossibly vivid blue. Storm + Blue = Pure, like nature's own purification system.
Quick recall
A storm clears to reveal blue skies—everything feels pure.

Details

The keyword for 清 is pure. This kanji conveys the idea of cleanliness, clarity, and purity, referring to something that is free from contamination or impurity. It often describes water that is crystal clear, air that is fresh, or a state of moral and spiritual cleanliness. By extension, it can also suggest a sense of refreshing coolness or serenity.
On'yomi
せい、しょう、しん
Kun'yomi
きよ.い、きよ.まる、きよ.める