This is the 10734th most frequent Spanish word.
denso
Thick or dense.
In this example, 'denso' is applied to refer to the physical thickness or compactness of the fog.
La niebla densa cubría toda la ciudad por la mañana.
The dense fog covered the entire city in the morning.
In this context, 'denso' describes something physically thick and heavily packed, specifically the forest's vegetation.
El bosque era tan denso que apenas dejaba pasar la luz.
The forest was so dense that barely allowed light to pass through.
Here, 'denso' refers to something intellectually complex or rich, emphasizing the challenging nature of the reading material.