fiendish in a sentence

Definition

Fiendish: extremely clever or intricate in a way that is often wicked or malicious.

The detective was impressed by the fiendish complexity of the criminal's plan.
She devised a fiendish puzzle that left even the sharpest minds stumped for hours.
His fiendish grin suggested that he was up to no good once again.
The fiendish child managed to sneak cookies before dinner, much to her mother's dismay.
In the horror film, the villain's fiendish traps kept the audience on the edge of their seats.