perfidiousness (noun)

1. In the comics, the supervillain's perfidiousness was revealed when he turned against his own team.

2. The horror movie portrayed the perfidiousness of the main character as he plotted the murder of his best friend.

3. The science fiction novel explored the perfidiousness of an advanced alien species that pretended to be allies while secretly planning Earth's destruction.

4. Why did the chicken trust the perfidiousness of the fox? Because it believed in second chances! (Joke)