fiendish

adjective

ˈfēn-dish How to pronounce fiendish (audio)
Definition of fiendishnext
1
as in demonic
of, relating to, or worthy of an evil spirit a fiendish delight in playing cruel tricks

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Antonyms & Near Antonyms
2
as in brutal
having or showing the desire to inflict severe pain and suffering on others shook with fiendish laughter as he watched his victims writhe in agony

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Antonyms & Near Antonyms

Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of fiendish Plotting kind of my most fiendish, happy, mad scientist state. — Literary Hub, 4 May 2026 The soloist in the Sibelius was a mediocre violinist ill-equipped to deal with the concerto’s profound emotions and fiendish technical demands. — Luis Palomares, Miami Herald, 27 Feb. 2026 Jim Carrey plays the eponymous Grinch, a fiendish Whoville outlaw who declares war on the festive season. — Danny Horn, Entertainment Weekly, 29 Nov. 2025 Miller works with him to refine the routes, placing checkpoints that are both fair and fiendish. — New Atlas, 1 Nov. 2025 See All Example Sentences for fiendish
Recent Examples of Synonyms for fiendish
  1. demonic
  2. brutal
  3. sinister
  4. cruel
  5. diabolical
  6. vicious
  7. malicious
  8. savage
Adjective
  • Pane and McKay revealed that British actor Simon Pegg will voice the Balrog, a giant demonic monster who helps Sauron forge the One Ring.
    — Laura Sirikul, Forbes.com, 27 July 2026
  • Higuchi was already at home in this rubbery soundworld, but his determination to work out his own feelings in this already frenzied context pushes his music past the cartoonish and into the truly demonic.
    — Daniel Bromfield, Pitchfork, 27 July 2026
Definition of demonic
Adjective
  • What follows is a brutal fight for survival against aggressive, hungry, and carnivorous dinosaurs who quickly turn the community's previously idyllic streets into their own personal feeding ground.
    — Megan McCluskey, Time, 14 Aug. 2026
  • The company's earnings should also benefit from a better freight cycle, which has shown signs of improvement after a brutal multiyear recession that began in 2022.
    — Jeff Marks, CNBC, 14 Aug. 2026
Definition of brutal
Adjective
  • When his girlfriend, Nicki (Debbie Harry), disappears at an audition for the show, he is drawn even deeper into its sinister world.
    — Declan Gallagher, Entertainment Weekly, 7 Aug. 2026
  • Jordan Roth plays Bentley’s somewhat sinister, sometimes helpful right hand kitted out post-glam Bowie style.
    — Robert Lloyd, Los Angeles Times, 5 Aug. 2026
Definition of sinister
Adjective
  • Impermanence turns out to be the cruelest fact and the most merciful one at once.
    — Dr. Lucy McBride, Time, 8 Aug. 2026
  • His central characters can be nasty, disgusting, violent, hysterically cruel, and passionately consumed.
    — CT Jones, Rolling Stone, 8 Aug. 2026
Definition of cruel
Adjective
  • What outrages Marylanders is that this diabolical plan excludes the Preakness, devaluing it and implying the Triple Crown is irrelevant, if not dead.
    — Stephen J. K. Walters, Baltimore Sun, 12 Aug. 2026
  • The late Lance Reddick is a delight in one of his final roles, as their diabolical CEO.
    — Judy Berman, Time, 11 Aug. 2026
Definition of diabolical
Adjective
  • And on the other side of the ball, this defense has a chance to be downright vicious.
    — Dieter Kurtenbach, Mercury News, 12 Aug. 2026
  • Heidegger, the philosopher of authenticity and independent thought, had become one of them, surrendering to vicious political cant.
    — David Denby, New Yorker, 10 Aug. 2026
Definition of vicious
Adjective
  • This will likely not be the last time US courts see the malicious tactic, as AI tools become more commonplace in court systems.
    — Ashley Belanger, ArsTechnica, 14 Aug. 2026
  • After all, an agent could accept a URL and download a malicious package without its human user even knowing.
    — David Berreby, IEEE Spectrum, 13 Aug. 2026
Definition of malicious
Adjective
  • The savage battles of Iwo Jima and Okinawa had already demonstrated the ferocity with which Japanese forces would defend their homeland.
    — James M. Scott, Time, 10 Aug. 2026
  • The lifestyle mogul made a savage comment about Meghan Markle in a cover story for PEOPLE on Wednesday, calling out her Netflix show, With Love, Meghan.
    — Leigh Blickley, Entertainment Weekly, 6 Aug. 2026
Definition of savage

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Cite this Entry

“Fiendish.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/fiendish. Accessed 16 Aug. 2026.

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Nglish: Translation of fiendish for Spanish Speakers

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