noun
foundation
fown-DAY-shuhn/faʊnˈdeɪʃn/
The supporting base on which a structure rests.
The house rests on a concrete foundation that keeps it stable.

Etymology
From fundare, “to lay a foundation,” the noun first named the action of founding. It came to name the solid base of a structure, connecting the act of establishing something with the support beneath it.
In context
this is the foundation of some kind of game or simulation it has the basics
More examples
- Workers pour the foundation before building the walls.
- The inspector checks the old barn's foundations for cracks.
- Daily practice builds a strong foundation for learning the piano.
Forms
foundation · foundations
foundational adjective — Providing the basic support for something.