Englishfor English speakers
nerve
Noun
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A nerve is a cell in the body that sends signals. The brain is made of nerves.
She can't feel anything with this arm, and can't move her arm, because the nerves were cut in an accident.
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Nerve is confidence: a feeling of being able to do something.
He didn't have the nerve to ask her to dance.
You had a lot of nerve, saying that to me! Go away!
cavity
Noun
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A cavity is a hole or hollow area.
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A cavity is a hollow area inside the body (like the sinuses).
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A cavity is a hole in a decayed tooth.
You have a cavity in your back teeth.