This is the 11789th most frequent Swedish word.
police
Police (Swedish: polis): A civil force responsible for maintaining public order, enforcing laws, and preventing crime.
Here, 'polisen' refers to the collective entity of law enforcement.
Polisen utreder en brottsplats.
The police are investigating a crime scene.
In this sentence, 'polisbilar' specifies vehicles belonging to the police force.
Vi såg flera polisbilar åka förbi snabbt.
We saw several police cars driving by quickly.
Here, 'polis' refers to an individual member of the police force, i.e., a police officer.