This is the 2373rd most frequent Catalan word.
muntar
To assemble, to ride, or to mount.
Here, 'muntar' is used to mean 'to set up' or 'to assemble'.
Ahir vam muntar una tenda al bosc.
Yesterday we set up a tent in the forest.
In this sentence, 'muntar' refers to 'to ride' an animal or a vehicle.
Va muntar a cavall per primer cop a la seva vida.
He rode a horse for the first time in his life.
Here, 'muntar' signifies 'to organize' or 'to prepare' something like an event.