What is another word for fiendish?

Need synonyms for fiendish? Here's a list of words from our thesaurus that you can use instead.

Extremely cruel or unpleasant
“I seem to be stuck halfway between fiendish laughter and pathetic sobbing.”
Extremely awkward or complex
“The superlatively analytical Inspector Hemingway reveals his unnerving talent for solving a fiendish problem.”
Of, relating to, or worthy of an evil spirit
“… a fiendish delight in playing cruel tricks.”
“A fiendish plan.”
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