Englishfor English speakers
acid
Noun
—
An acid is a liquid with a high number of hydrogen ions in it that can burn things.
Fruit often has a little acid in it.
The acid burned the table.
Acids taste sour but bases taste bitter.
acid
Adjective
—
If something is acid, it is like an acid, from an acid, or acidic.
The factories nearby have made the lake more acid.
—
If something has an acid taste, it is sour.
—
If something said or done to you was acid, it was hurtful.
Their acid comments are painful.
medium
Adjective
—
A medium amount is an amount that is not small and not large, but in the middle.
Would you like a small, medium or large drink?
medium
Noun
—
A medium is stuff that something moves through.
Light can go through different media: air, water, glass.
Sound waves slow down when they go through this kind of medium.
—
A medium is a person who hears ideas that come from people who are dead.
We all closed our eyes, and the medium said "I hear your father speaking."
I don't believe those mediums can really hear anything.