澄
チョウ, す.む, す.ます, す.ます, きよ, すす, すみ, み

lucidity, be clear, clear, clarify, settle, strain, look grave

JLPT1 G7 S15 F1722

登# rise + 水 water → the clear part of a liquid substance that rises to the top → *make/become clear* → *clean*; *transparent*; *purify* → *serene*. Also, *put on airs* (← superior to others ← pure).

[Full Kanji Etymology List]