垢 dirt

Meaning	dirt; grime; earwax
On	コウ、ク
Kun	あか、はじ
Strokes	9
First met	N4 lesson 7, in 水垢

Stroke order

Words

Word	Reading	Meaning	Level
水垢	みずあか	water scale, limescale	N4
湯垢	ゆあか	mineral bath scum	N4

Examples

お客様(きゃくさま)が気持(きも)ちよく湯船(ゆぶね)に浸(つ)かれるよう、石段(いしだん)の隅(すみ)についた水垢(みずあか)を毎日(まいにち)たわしで磨(みが)き落(お)としています。

So that guests can soak pleasantly in the bathtub, I scrub away the water scale on the corners of the stone steps every day with a brush. (N4 lesson 7)