Trapdoor (noun)

A door or cover in a floor, ceiling, or roof that can be lifted or opened to provide access to a space below.

Origin:

19th century: from trap (a noun originally denoting a place for trapping game) + door.

Examples:

1. Trapdoors are commonly used in attic spaces, basements, and crawl spaces to provide access for maintenance and repairs.
2. Trapdoors can be made of various materials, including wood, metal, and plastic.
3. Trapdoors are often used in theatrical productions and magic shows as a means of making performers disappear or reappear.
4. Trapdoors can also be used in secret passageways or escape routes in castles, fortresses, and other secure buildings.
5. Trapdoors must be designed and installed properly in order to ensure stability, safety, and ease of use.