Englishfor English speakers
boil
Verb
—
To get to a temperature that a liquid lets out bubbles and gas at.
Water boils at 100°C.
Anne boiled the water in the kettle.
boil
Noun
—
If you bring something to a boil, you heat it to 100&;nbsp;°C.
—
A swelling on the skin that is filled with pus.
Lots of boils started appearing on his skin.
proof
Noun
—
Proof is evidence which shows something is correct.
He has proof that he was not at the crime scene. A witness says that they were somewhere else.
—
A proof can show how a theorem is correct.