Chamber (noun)

1. A room in a house or building, typically one used for a particular purpose.
2. An enclosed space within a larger structure, especially one used for a particular purpose, such as a chamber in a gun or a heart chamber.
3. A deliberative or legislative assembly, especially one of a governmental or political body.

Origin:

The word "chamber" has its roots in the old french word "chambre" which meant room or apartment. it has been in use in english since the 14th century to describe a room or enclosed space.

Examples:

1. He retired to his chamber after a long day at work.
2. The heart has four chambers, two atria and two ventricles.
3. The chamber was filled with smoke from the burning incense.
4. The chamber of commerce is a business organization that promotes the interests of local businesses.
5. The chamber of the house of representatives was packed with people for the vote.