This is the 1957th most frequent Spanish word.
sólida
Solid.
In this sentence, 'sólida' is used to describe the robustness and durability of the building's construction.
La construcción de este edificio es muy sólida.
The construction of this building is very solid.
Here, 'sólida' metaphorically refers to a strong and reliable foundation for initiating the project.
Necesitamos una base sólida para comenzar este proyecto.
We need a solid foundation to start this project.
In this usage, 'sólida' signifies that the argument is well-founded, logical, and convincing.