This is the 855th most frequent Spanish word.
fundación
Foundation; the act of founding, establishment, or an institution or organization.
In this sentence, 'fundación' refers to the physical base or groundwork of a structure (a building).
La fundación del edificio es sólida.
The foundation of the building is solid.
Here, 'fundación' denotes an institution or organization, typically a charitable or non-profit entity.
La fundación organiza eventos para recaudar fondos.
The foundation organizes events to raise funds.
In this context, 'fundación' implies a conceptual or historical origin or establishment, such as the beginning or basis of a discipline.