Englishfor English speakers
chemical
Noun
—
A chemical is a basic substance that is used in or produced by mixing elements or other chemicals.
When you burn plastics, you put dangerous chemicals into the air.
The chemical industry in China is producing more and more useful paints, glues, and other products.
chemical
Adjective
—
Of or about chemicals.
This test can detect small changes in the chemical composition of water.
accident
Noun
—
An accident is something that happens without a plan, usually something bad.
I dropped the glass by accident and it broke.
—
An accident is a vehicle crash.
Two people were hurt in a road traffic accident between a car and a motorcycle last night.