澄

clear

perfectly clear and serene sky

whirligig beetle (any insect of family Gyrinidae, esp. the Japanese whirligig beetle, Gyrinus japonicus)

limpid water

clear layer of fluid (at the top of a mixture)

to look unconcerned

lucid

clear and bright

to sharpen

to be perfectly clear (water, air, etc.)

perfectly clear

to be perfectly clear

to listen attentively

a prim person

to put on airs

perfectly clear mirror

perfectly clear mirror

clarifying agent

to become clear (water, air, etc.)

clearness (e.g. sky)

to listen carefully

to affect a serene mood

primness

primness

clarified butter

primly

to clear