This is the 12011th most frequent Swedish word.
regeringspartiernas
"Regeringspartiernas" means "of the government parties" in English.
In this sentence, 'regeringspartiernas' refers to the possessive form indicating belonging to the government parties.
Regeringspartiernas ledare träffades för att diskutera klimatförändringar.
The leaders of the government parties met to discuss climate change.
Here, 'regeringspartiernas' signifies the possession by the government parties to explain the majority group.
Lagförslaget godkändes av regeringspartiernas majoritet.
The bill was approved by the majority of the government parties.
In this case, 'regeringspartiernas' shows ownership of the decisions made by the government parties.