This is the 8437th most frequent Swedish word.
bassänger
"Pools."
Here, 'bassängerna' refers to pools specifically, and it is in the definite plural form indicating multiple specific pools.
Barnen lekte i bassängerna hela dagen.
The children played in the pools all day.
In this sentence, 'Bassänger' is used in the indefinite plural form, referring generally to pools as a concept.
Bassänger är populära platser att bada och koppla av.
Pools are popular places to swim and relax.
The word 'bassänger' is used in the indefinite plural form, describing multiple pools seen at the hotel.