Englishfor English speakers
gravel
Noun
—
Gravel is small stones that are used in construction.
The road is mostly gravel and mud.
packed
—
adjective
(= jammed, jam-packed)
filled to capacity
a suitcase jammed with dirty clothes
stands jam-packed with fans
a packed theater
—
adjective
pressed together or compressed
packed snow
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.