This is the 10273rd most frequent Swedish word.
invånares
"Invånares" means "inhabitants'" (possessive form of inhabitants) in English.
The word 'invånarnas' is used here in the possessive form (genitive), specifying "the inhabitants' needs."
Staden har vuxit snabbt och invånarnas behov har förändrats.
The city has grown quickly, and the needs of the inhabitants have changed.
Here, 'invånarnas' again shows possession, highlighting "the engagement of the inhabitants."
Invånarnas engagemang i miljöfrågor är imponerande.
The inhabitants' engagement in environmental issues is impressive.
In this sentence, 'invånarnas' refers to the possessive relationship indicating the ideas belong to the inhabitants.