This is the 9674th most frequent Spanish word.
asentada
"Settled" or "established."
Here, 'asentada' is used to indicate that the population is stably established or settled in a place.
La población está bien asentada en el valle.
The population is well established in the valley.
In this case, 'asentada' signifies being based or founded upon something, in this instance, concrete facts.
Su decisión estaba asentada en hechos concretos.
Their decision was based on concrete facts.
Here, 'asentada' is used metaphorically to describe something firmly anchored or grounded in principles.