as in diabolically
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Recent Examples of fiendishly
Of the four dropped catches, two were fiendishly difficult, one was eminently takeable, and one was a howler.
—
Tim Spiers, New York Times, 6 Jan. 2026
The ending is easy to anticipate and no less fiendishly pleasing for it; seeing the karmic scales balanced this well deserves a hearty Cryptkeeper cackle.
—A.a. Dowd, Vulture, 3 Oct. 2025
But at the time, training such a multilayer neural network was fiendishly difficult.
—Jeremy Kahn, Fortune, 3 Sep. 2025
Recent Examples of Synonyms for fiendishly
diabolically
Adverb
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That’s par for the course in a facility where all of the nurses are angels (Fisayo Akinade’s diabolically endearing Nurse Angel in particular), and nobody else seems to be sick.—
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Another long-leaf cactus, the Spanish bayonet, was diabolically equipped with a blood groove.—
Cite this Entry
“Fiendishly.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/fiendishly. Accessed 13 Jan. 2026.
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