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
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
But that’s just the cherry on top of a perfectly cartoonish opening to the best film this fiendish horror franchise from the 2000s has ever known.
—
Alison Foreman, IndieWire, 13 May 2025
What to know about Blue Origin after celebrity spaceflight NASA's Perseverance rover captures 'fiendish' dueling dust devils on Mars: See video
What causes the Lyrid meteors?
—Eric Lagatta, USA Today, 19 Apr. 2025
The red Indian of the Western plains tied his prisoner to the stake, tortured him, and danced in fiendish glee while his victim writhed in the flames.
—Liz Tracey, JSTOR Daily, 21 Feb. 2025
Jumbo brings a humanizing clarity to Lady Macbeth without in the least compromising her character’s fiendish side.
—Charles McNulty, Los Angeles Times, 19 Feb. 2025
See All Example Sentences for fiendish
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Alison Foreman, IndieWire, 13 May 2025
What to know about Blue Origin after celebrity spaceflight NASA's Perseverance rover captures 'fiendish' dueling dust devils on Mars: See video
What causes the Lyrid meteors?
—Eric Lagatta, USA Today, 19 Apr. 2025
The red Indian of the Western plains tied his prisoner to the stake, tortured him, and danced in fiendish glee while his victim writhed in the flames.
—Liz Tracey, JSTOR Daily, 21 Feb. 2025
Jumbo brings a humanizing clarity to Lady Macbeth without in the least compromising her character’s fiendish side.
—Charles McNulty, Los Angeles Times, 19 Feb. 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 6 Jul. 2025.
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