Ante-rooms, also known as waiting rooms, reception areas or preludes, are often used for guests to wait before being received. However, there are a few antonyms for ante-rooms, such as "inner sanctum," "inner chamber," or "innermost chamber." These words refer to private areas of a house or building, oftentimes reserved only for select individuals. Unlike an ante-room that is meant for public use, the inner sanctum is typically used for personal and confidential affairs. Other antonyms for ante-rooms include "backroom," "basement," or "attic," which all suggest isolated, uncomfortable spaces that are not typically welcoming or hospitable.