Correct

沉渣

/ chēn zhā / 
Strokes

Definition

sediment

Example

As a Noun

sediment; dregs

1
Qīngxǐ
清洗
cháhú
茶壶
lǐ
里
de
的
chēnzhā
沉渣

rinse the dregs out of the teapot

As a Noun

dregs of society; scum