This is the 4273rd most frequent French word.
entourent
"Entourent" means "surround."
In this sentence, 'entourent' is used to describe how mountains physically encircle the valley, highlighting a spatial relationship.
Les montagnes entourent la vallée.
The mountains surround the valley.
Here, 'entourent' metaphorically represents the framing or association of mysteries with the civilization, emphasizing an abstract connection.
De nombreux mystères entourent cette ancienne civilisation.
Many mysteries surround this ancient civilization.
In this example, 'entourent' illustrates a deliberate protective action by people, contextualized in a behavioral sense.