This is the 410th most frequent Swedish word.
polisens
"Polisens" means "the police's" or "of the police" in English, indicating possession.
In this usage, 'polisens' conveys possession of the warnings ('varningar') issued by the police.
Att lyssna på polisens varningar kan rädda liv.
Listening to the police's warnings can save lives.
'Polisens' here specifies the operation ('insats'), showing that the operation was carried out by the police, functioning possessively.
Vi hörde om polisens insats på nyheterna.
We heard about the police's operation on the news.
In this sentence, 'polisens' denotes possession, as it is the genitive form of 'polisen' (the police) indicating that the work belongs to the police.