Englishfor English speakers
scrubbing
—
noun
(= scrub)
the act of cleaning a surface by rubbing it with a brush and soap and water
filter
Noun
—
A filter is a piece of equipment that put gas or liquid through to take out the parts you don't want, to clean it.
Car engines have a fuel filter to keep the fuel clean.
filter
Verb
—
If you filter a gas or a liquid, you put it through something that takes out the parts you don't want.
We filter the water.