Breather (noun)

1. A short break or rest period.
2. A device that allows air or gas to enter or escape.

Origin:

Breather is derived from the word breath which means the act of inhaling and exhaling air.

Examples:

1. The workers were grateful for the breather during their long shift.
2. I need a breather before I continue working on this project.
3. The breather valve on the pump allows the pressure to be released.
4. The breather on the gasoline tank allows air to enter as the fuel is used up.
5. The breather in the oil system helps to prevent the build-up of pressure.