This is the 1381st most frequent Spanish word.
basa
"Basis" or "foundation" in English, depending on context.
In this sentence, 'basa' is used as the verb 'basar' in third person singular present tense, indicating that the subject is grounded or founded on something.
La teoría se basa en investigaciones científicas.
The theory is based on scientific research.
Here 'basa' again derives from 'basar' in third person singular present tense and denotes the act of establishing a foundation for actions based on certain principles.
Él basa sus decisiones en hechos comprobados.
He bases his decisions on proven facts.
Similarly, 'basa' functions as the verb 'basar', describing how the structure is influenced or designed according to something.