sublevel
/ˈsʌbˌlɛvəl/
noun
- A level or layer that is part of a larger level or system, especially in a hierarchy or structure.
- In the video game, each world has several sublevels that players must complete.
- The mine has a main tunnel and many sublevels where miners extract ore.
- The company's organizational chart includes a main department and several sublevels of management.