This is the 898th most frequent Spanish word.
profunda
Deep.
Here, 'profunda' describes the depth or thoroughness of understanding, functioning as an adjective modifying 'comprensión' (understanding).
Ella tiene una comprensión profunda del tema.
She has a deep understanding of the subject.
In this example, 'profunda' describes the physical depth of the cave, acting as an adjective modifying 'cueva' (cave).
La cueva es profunda y oscura.
The cave is deep and dark.
Here, 'profunda' conveys the intensity and emotional depth of sadness, serving as an adjective modifying 'tristeza' (sadness).