Words similar to fiendish

Example sentences for: fiendish

How can you use “fiendish” in a sentence? Here are some example sentences to help you improve your vocabulary:

Jack routinely pockets cash from Sid Hudgens (Danny DeVito), the film's occasional narrator, a reporter for Hush-Hush magazine and a fiendish imp out of Frank Gifford's nightmares: Hudgens sets up public figures with drugs or prostitutes, then calls in Vincennes to make the bust and pose for pictures.
I didn't conduct any fiendish experiments on loo paper--I figured that the product's purpose is specific enough that a trial "in the field" would tell me all I needed to know.