This is the 1019th most frequent Swedish word.
falska
"Falska" means "false" or "fake" in English.
In this sentence, 'falska' describes 'dokument', signifying that the documents are not authentic or counterfeit.
Dessa dokument visade sig vara falska.
These documents turned out to be fake.
The word 'falska' is used as an adjective to describe 'toner', meaning false or off-pitch notes in music.
De sjöng falska toner under konserten.
They sang false notes during the concert.
The word 'falska' here modifies 'historia', indicating that the story is deceptive or untrue.