diabolical

Meet the diabolical family-like group who runs one of the biggest—and most frightening—haunted houses in America.

It was quite clear that he could not endure the thought of being "swung" for his diabolical deed.

But that was only reckoned fresh evidence of her diabolical power.

Somnambulism is, with Luther, the result of diabolical agency.

The stranger said nothing, but his eye looked a diabolical suggestion.

He shows a diabolical cunning in the manufacture of his weapons.