This is the 6714th most frequent French word.
keerbergen
"Keerbergen" is not a French word; it is a proper noun referring to a town in Belgium.
In this sentence, "Keerbergen" is used as a proper noun referring to a specific place.
Keerbergen est une charmante commune en Belgique.
Keerbergen is a charming municipality in Belgium.
Here, "Keerbergen" again identifies a location where the subject experienced the event.
J'ai passé un week-end agréable à Keerbergen avec mes amis.
I spent a pleasant weekend in Keerbergen with my friends.
In this case, "Keerbergen" refers to a community, focusing on its population as a defining feature.