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
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
However, when one of their father's patients (David Dastmalchian) transmits a fiendish entity into their home, the fractured family must come together to survive.
—
Lia Beck, People.com, 25 Oct. 2024
Mason Alexander Park brings a David Bowie-ish quality to St. Jimmy, Johnny’s fiendish drug dealer.
—Charles McNulty, Los Angeles Times, 11 Oct. 2024
The favorite characters return, their fiendish traits on full display.
—Vogue, 19 July 2024
But commercializing nuclear fusion still remains a long way off as scientists work to solve fiendish engineering and scientific difficulties.
—Laura Paddison, CNN, 1 Apr. 2024
See all Example Sentences for fiendish 
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Lia Beck, People.com, 25 Oct. 2024
Mason Alexander Park brings a David Bowie-ish quality to St. Jimmy, Johnny’s fiendish drug dealer.
—Charles McNulty, Los Angeles Times, 11 Oct. 2024
The favorite characters return, their fiendish traits on full display.
—Vogue, 19 July 2024
But commercializing nuclear fusion still remains a long way off as scientists work to solve fiendish engineering and scientific difficulties.
—Laura Paddison, CNN, 1 Apr. 2024
See all Example Sentences for fiendish
Dictionary Entries Near fiendish
Cite this Entry
“Fiendish.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/fiendish. Accessed 14 Nov. 2024.
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