This is the 8382nd most frequent Swedish word.
badrum
Bathroom.
Here, 'badrum' is used in its definite form ('badrummet') to refer to a specific bathroom.
Jag behöver rengöra badrummet.
I need to clean the bathroom.
In this sentence, 'badrummet' is in the definite form and denotes a planned renovation of a specific bathroom.
Vi ska renovera badrummet nästa vecka.
We are going to renovate the bathroom next week.
Here, 'badrum' is in the indefinite singular form ('ett badrum'), asking if any bathroom exists on this floor.