1
: perversely diabolical
took a fiendish pleasure in hurting people
2
: extremely cruel or wicked
3
: excessively bad, unpleasant, or difficult
fiendish weather
fiendishly
adverb
fiendishness
noun
Synonyms of fiendish
Examples of fiendish in a Sentence
He takes a fiendish delight in hurting people.
a fiendish delight in playing cruel tricks
Recent Examples on the Web
Miller works with him to refine the routes, placing checkpoints that are both fair and fiendish.
—
New Atlas, 1 Nov. 2025
Next up is Pagli, a madwoman with a thin, charred body, fiendish laugh, and ghoulish shrieks.
—JSTOR Daily, 30 Oct. 2025
And, to top it off, the fiendish parody generally received positive reviews — ours included.
—Michael Lee Simpson, Entertainment Weekly, 29 Oct. 2025
Johann Sebastian Bach’s The Art of Fugue is a fiendish work of near-mythical status.
—Genevieve Marks, Air Mail, 25 Oct. 2025
See All Example Sentences for fiendish
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New Atlas, 1 Nov. 2025
Next up is Pagli, a madwoman with a thin, charred body, fiendish laugh, and ghoulish shrieks.
—JSTOR Daily, 30 Oct. 2025
And, to top it off, the fiendish parody generally received positive reviews — ours included.
—Michael Lee Simpson, Entertainment Weekly, 29 Oct. 2025
Johann Sebastian Bach’s The Art of Fugue is a fiendish work of near-mythical status.
—Genevieve Marks, Air Mail, 25 Oct. 2025
See All Example Sentences for fiendish
Cite this Entry
“Fiendish.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fiendish. Accessed 17 Nov. 2025.
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