1
as in intense
extreme in degree, power, or effect
the hellacious heat was more than we could bear
Synonyms & Similar Words
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Antonyms & Near Antonyms
2
as in difficult
requiring considerable physical or mental effort
the pioneers survived a particularly hellacious river crossing with their covered wagon barely in one piece
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Example Sentences
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Recent Examples of hellacious
Having a baby is never an easy experience, but the sixth episode of Outlander: Blood of My Blood plunged poor Julia (Hermione Corfield) into a hellacious labor experience.
—
Maureen Lee Lenker, Entertainment Weekly, 6 Sep. 2025
Even in the hellacious conditions of Greater Los Angeles, the suspension absorbs severe potholes, broken surfaces and expansion joints with little more than the sound of a muffled timpani strike.
—Mark Ewing, Forbes.com, 2 Aug. 2025
The other nailed two runners on the bases with some of the most hellacious throws anyone had ever seen.
—Tyler Kepner, New York Times, 11 July 2025
Lineups featuring the trio of Dunn-Jones-Leonard are going to be hellacious.
—Shane Young, Forbes, 13 Dec. 2024
See All Example Sentences for hellacious
Maureen Lee Lenker, Entertainment Weekly, 6 Sep. 2025
Even in the hellacious conditions of Greater Los Angeles, the suspension absorbs severe potholes, broken surfaces and expansion joints with little more than the sound of a muffled timpani strike.
—Mark Ewing, Forbes.com, 2 Aug. 2025
The other nailed two runners on the bases with some of the most hellacious throws anyone had ever seen.
—Tyler Kepner, New York Times, 11 July 2025
Lineups featuring the trio of Dunn-Jones-Leonard are going to be hellacious.
—Shane Young, Forbes, 13 Dec. 2024
See All Example Sentences for hellacious
Recent Examples of Synonyms for hellacious
Adjective
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For the seventh year in a row, Walmart captured more money from Charlotte-area shoppers than any other grocery store, despite intense competition from local grocers like Harris Teeter and Food Lion.—
Charlotte Observer,
Charlotte Observer,
2 Apr. 2026
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Graves’ exit has sparked intense speculation about his potential successor to represent Missouri’s 6th Congressional District, which stretches across northern Missouri and touches Kansas City’s Northland.—
Kacen Bayless,
Kansas City Star,
1 Apr. 2026
Adjective
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Christie acknowledged that the Kings were in a difficult position given their recent schedule injury situation.—
Jason Anderson,
Sacbee.com,
30 Mar. 2026
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Even putting the tank on the ice was more difficult this year.—
Spencer Wilson,
CBS News,
30 Mar. 2026
Adjective
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These are the military's most elite forces, who have undergone intensive physical and technical training for this type of mission.—
CBS News,
CBS News,
28 Mar. 2026
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Radar works in these conditions but is power-intensive for small drones.—
Nitin Sanket,
The Conversation,
27 Mar. 2026
Adjective
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Orkin bed bug control Bed bug treatment is challenging, but something that Orkin excels at.—
Alora Bopray,
USA Today,
1 Apr. 2026
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Turning your attention inward can feel challenging.—
J. David Creswell,
The Conversation,
31 Mar. 2026
Adjective
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Nothing except getting into fierce arguments with fellow-Jews, some would say, which Olitzky—who has a round, boyish face and a conciliatory manner—portrayed as a privilege rather than a burden.—
Eyal Press,
New Yorker,
30 Mar. 2026
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With one-of-a-kind offerings from the likes of Inglenook, Crocker & Starr, Amici Cellars, Peju, Long Meadow Ranch, and a collaboration between Dakota Shy and Detert Family Vineyards, bidding was fierce on Cabernet Franc.—
Mike DeSimone,
Robb Report,
29 Mar. 2026
Adjective
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The real minutes, tough minutes on the road, stressful.—
Daniel Sperry,
Kansas City Star,
26 Mar. 2026
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After those seven players, things get a little tough to project.—
Mike Kaye
March 26,
Charlotte Observer,
26 Mar. 2026
Adjective
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Sierra Canyon used a ferocious press and got points from unexpected places, like 3-pointers from Stephen Kankole, dunks from Jordan Mize and 11 points with 10 assists from JJ Sati-Grier.—
Tarek Fattal,
Daily News,
26 Mar. 2026
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Still, any attempt to use Harry Potter as a lens through which to view human decency can’t avoid the ferocious, half-blind dragon in the room.—
Séamas O'Reilly,
Vulture,
26 Mar. 2026
Adjective
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Cameron is completing the rigorous prerequisites to apply to the competitive cardiovascular technology program at Grossmont College while caring for her daughter.—
Julie Gallant,
San Diego Union-Tribune,
27 Mar. 2026
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Every car insurance review is based on rigorous reporting by our team of expert writers and editors with extensive knowledge of car insurance products.—
Liz Knueven,
CNBC,
27 Mar. 2026
Cite this Entry
“Hellacious.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/hellacious. Accessed 2 Apr. 2026.
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