IPA: /nəˈtɔːtəˌrɪəm/
KK: /nəˈtɔːtərɪəm/
A building that contains a swimming pool, usually for public use or for training purposes.
The local natatorium offers swimming lessons for children and adults.
Natatorium → It is formed from "natus" (meaning born) and "-orium" (meaning a place for). The word refers to a place where one is born to swim, specifically a swimming pool.
Think of a place where you are 'born' to swim — 'natus' means born, and '-orium' indicates a place.