oförskämdhet

Swedish

oförskämdhet c

being rudely disrespectful; rudeness, impertinence
Din oförskämdhet känner inga gränser
Your rudeness knows no limits
an instance of the above; a rudely disrespectful utterance or expression, an impertinence
Försvinn, jag vill inte höra fler av dina oförskämdheter (note plural)
Go away, I don't want to hear any more of your rudeness/impertinences/insolence

Except for oförskämdhet being a more well-known and less literary word, impertinence is a good match for the meaning.

Declension of oförskämdhet