1
as in demonic
of, relating to, or worthy of an evil spirit
a fiendish delight in playing cruel tricks
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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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Example Sentences
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Recent Examples of fiendish
Next up is Pagli, a madwoman with a thin, charred body, fiendish laugh, and ghoulish shrieks.
—
JSTOR Daily, 30 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
But a new shingle (and URL) outside the Pentagon does not solve the fiendish challenges of running the Army, Navy, Marine Corps, Air Force, Coast Guard and Space Force.
—Andreas Kluth, Twin Cities, 11 Sep. 2025
So as access to this technique expands, no flaw, failure, or fiendish trick will be able to hide.
—IEEE Spectrum, 30 Apr. 2022
See All Example Sentences for fiendish
JSTOR Daily, 30 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
But a new shingle (and URL) outside the Pentagon does not solve the fiendish challenges of running the Army, Navy, Marine Corps, Air Force, Coast Guard and Space Force.
—Andreas Kluth, Twin Cities, 11 Sep. 2025
So as access to this technique expands, no flaw, failure, or fiendish trick will be able to hide.
—IEEE Spectrum, 30 Apr. 2022
See All Example Sentences for fiendish
Recent Examples of Synonyms for fiendish
Adjective
-
It was named for Lilith, a demonic figure of Jewish folklore who is said to have been Adam’s first wife (before Eve).—
Encyclopedia Britannica,
Encyclopedia Britannica,
8 May 2026
-
Aside from unpredictable fellow patients — some of whom are prone to violent outbursts — Pepper also has horrifying visions of a demonic beast.—
Eric Andersson,
PEOPLE,
6 May 2026
Adjective
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The creature-feature horror film plunges into the jungles of the Dominican Republic, where a group of road workers battling brutal conditions encounter the Ciguapa — a terrifying figure from local folklore with backward feet and the power to possess men through her gaze.—
Anna Marie de la Fuente,
Variety,
15 May 2026
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Anyone familiar with the show knows what comes next probably won't be pretty, but even diehard fans will be shocked by how brutal Scattered Hopes can be.—
Ian Stokes,
Space.com,
15 May 2026
Adjective
-
Anais has no idea that this institute in the desert is run by a secret cult – where healing is not the objective – but a gateway to something far more sinister.—
Roberto Prieto,
Variety,
13 May 2026
-
On their first album under the moniker, the two noisemakers from Animal Collective delight in this combination, foregrounding campfire acoustics while sinister drones lurk around the corner.—
Ethan Beck,
Pitchfork,
12 May 2026
Adjective
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Its cruel and even lawless excesses have reverberated around the globe.—
Kansas City Star,
Kansas City Star,
9 May 2026
-
This is how cruel football can be.—
Elias Burke,
New York Times,
7 May 2026
Adjective
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The story follows a group of people trapped in a mysterious town where monsters haunt the streets and night and diabolical forces seem determined to terrorize and confound our heroes.—
Erik Kain,
Forbes.com,
9 May 2026
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But Jim Parsons and Layton Williams all but run away with the evening, finding diabolical laughs as Rose’s helicopter mom and a Tina Turner-esque iceberg.—
Patrick Ryan,
USA Today,
3 May 2026
Adjective
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The story follows a Lebanese family caught in debts and schemes that drag them in a vicious cycle that tests their unity.—
Elsa Keslassy,
Variety,
13 May 2026
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But the score was a costly one since the penalty that sent up the goal — a vicious hit from defenseman Brayden McNabb — knocked Ducks forward Ryan Poehling out of the game.—
Los Angeles Times,
Los Angeles Times,
13 May 2026
Adjective
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The Celeste team argues that large, heavy drones pose a serious cybersecurity risk, as they could be hijacked and used for harm by malicious hackers.—
Chris Young,
Interesting Engineering,
14 May 2026
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That’s not necessarily malicious.—
Amber Harding OutKick,
FOXNews.com,
14 May 2026
Adjective
-
Critic Rex Reed, who died Tuesday at 87, built his career on savage, acerbic reviews delivered with little restraint, earning a reputation as a provocateur.—
Theater Critic,
Los Angeles Times,
12 May 2026
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Initially a beachy utopia where the children run free among nature, things become increasingly savage as help appears to be ever further away.—
Connor Sturges,
Condé Nast Traveler,
6 May 2026
Cite this Entry
“Fiendish.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/fiendish. Accessed 16 May. 2026.
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