This is the 4600th most frequent Spanish word.
basan
"Basan" is the third-person plural present tense of the verb "basar," meaning "they base."
Here, 'basan' is used to indicate the action of basing or grounding something, such as a project, on a particular foundation, in this case, scientific research.
Los estudiantes basan su proyecto en investigaciones científicas.
The students base their project on scientific research.
In this sentence, 'basan' describes the foundation or justification of theories being rooted in empirical evidence and practices.
Las teorías se basan en hechos comprobados y experimentación.
The theories are based on proven facts and experimentation.
This example uses 'basan' to show the reliance or reason for their trust, attributing it to the experience of their leader.