Oubliette (noun)

A dungeon or cell in a castle, especially one that was used to hold prisoners for life and was difficult to escape from.

Origin:

Derived from the french word 'oublier' meaning 'to forget'. this term was used in the medieval period to describe a dungeon or cell that was designed to be forgotten or to hold prisoners for life.

Examples:

1. The prisoner was thrown into an oubliette and left to die.
2. Many people consider the oubliette to be one of the cruelest forms of punishment.
3. The castle was famous for its oubliette, where prisoners were held without hope of escape.
4. The oubliette was a dark and cramped space where prisoners were often left to die.
5. Despite its reputation as a place of punishment and torture, some people believe that the oubliette was actually used for secret meetings and political plotting.