Nerves are long thin fibres that transmit messages between your brain and other parts of your body.

If you refer to someone's nerves, you mean their ability to cope with problems such as stress, worry, and danger.

You can refer to someone's feelings of anxiety or tension as nerves .

Nerve is the courage that you need in order to do something difficult or dangerous.

If you nerve yourself to do something difficult or frightening, you prepare yourself for it by trying to be brave.

If someone or something gets on your nerves, they annoy or irritate you.

If you say that someone has a nerve or has the nerve to do something, you are criticizing them for doing something which you feel they had no right to do.

If you hold your nerve or keep your nerve, you remain calm and determined in a difficult situation.

If someone is living on their nerves, they are continually worried and anxious about the situation that they are in.

If you lose your nerve, you suddenly panic and become too afraid to do something that you were about to do.

If you say that you have touched a nerve or touched a raw nerve, you mean that you have accidentally upset someone by talking about something that they feel strongly about or are very sensitive about.