herculean

adjective

ˌhər-kyə-ˈlē-ən How to pronounce herculean (audio)
Definition of herculeannext
1
as in difficult
requiring considerable physical or mental effort the herculean task of grading 60 student essays over one weekend

Synonyms & Similar Words

Relevance

Antonyms & Near Antonyms
2
as in enormous
unusually large a herculean banquet table that took eight men to lift it

Synonyms & Similar Words

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 herculean The task of containing Pennsylvania’s measles outbreak would have been herculean in any circumstance. — Amesh Adalja, Washington Post, 11 Sep. 2026 George Lucas, for his part, has suggested that bringing the Lucas Museum to fruition—a project beset by delays and controversy that has taken nearly a decade to realize—was a herculean effort. — Alex Greenberger, ARTnews.com, 3 Sep. 2026 The herculean effort For residents in a small community known as Rainbow Hill, the outlook is dire. — Megan Schrader, Denver Post, 27 Aug. 2026 The novel caught on slowly through word of mouth, aided by the herculean efforts of his niece Aron Ritchie, who found ways to increase the book’s visibility. — Mike Fleming Jr, Deadline, 19 Aug. 2026 Even the herculean efforts to acquire capabilities for the conflict with Iran largely amounted to a collection of waivers, special actions, and brute-force leadership. — Doug Beck, Foreign Affairs, 18 Aug. 2026 Viewed through a 2026 lens, this now antiquated process seems like a herculean undertaking, one that somehow worked. — Michael Ashley, Forbes.com, 12 Aug. 2026 Republicans started laying the groundwork for the herculean task of flipping Michigan the day after Rogers lost to Slotkin. — Burgess Everett, semafor.com, 6 Aug. 2026 The commission’s remit amounts to a herculean task for the future. — Taylor Luck, Christian Science Monitor, 4 Aug. 2026
Recent Examples of Synonyms for herculean
  1. difficult
  2. enormous
  3. challenging
  4. huge
  5. tough
  6. tremendous
  7. formidable
  8. gigantic
Adjective
  • The problem, Snegovaya said, is that achieving military autonomy for Europe and Ukraine is extremely difficult in the short term, and Europe has been slow to develop the necessary capabilities.
    — Elsa Ohlen, CNBC, 17 Oct. 2026
  • Past changes have pushed the glacier into a retreat that may be difficult to reverse, while new modeling suggests scientists may have underestimated how warm seawater reaches beneath it.
    — Kaif Shaikh, Interesting Engineering, 17 Oct. 2026
Definition of difficult
Adjective
  • With the enormous distractions and investments in college sports now removed, our institutions of higher learning can focus on their only mission, and that is providing the best, most affordable education on earth for our young people.
    — Bruce Svare, Sportico.com, 17 Oct. 2026
  • Its nuclear reactor gives it enormous endurance without needing to surface or snorkel to operate diesel engines.
    — Christopher McFadden, Interesting Engineering, 17 Oct. 2026
Definition of enormous
Adjective
  • As Hispanic Heritage Month continues, one musician at Philadelphia's Curtis Institute of Music is challenging expectations about classical music and the harp.
    — Madeleine Wright, CBS News, 16 Oct. 2026
  • Naomi Ackie, who plays the scientist charged with Hagen’s experimental procedure, praised how her co-star shouldered what was a very challenging role.
    — Chris Gardner, HollywoodReporter, 16 Oct. 2026
Definition of challenging
Adjective
  • Tre Tyus called up from practice squad, the big punt block at the end was huge, and the guys came together and found a way to win.
    — Charlotte Observer, Charlotte Observer, 18 Oct. 2026
  • Video also appears to show a drone striking a huge bridge in the city.
    — ABC News, ABC News, 18 Oct. 2026
Definition of huge
Adjective
  • Celebrity hairstylist Brian Magallones considers this the perfect balance between a not-too-fussy and not-too-structured chignon, a style that sounds tough to style without a professional team but is actually quite easy to master at-home.
    — Kaleigh Werner, Footwear News, 13 Oct. 2026
  • Coming off that dominant performance against the Yankees, Rasmussen went six-plus tough innings.
    — Rob Maaddi, Los Angeles Times, 13 Oct. 2026
Definition of tough
Adjective
  • Last-minute changes and unscheduled requests to cover other clients can place tremendous stress on the field caregiver.
    — Colin Conner II, Forbes.com, 16 Oct. 2026
  • There has been a tremendous amount of recent development in Chelsea, but, ever the story in New York City, as beloved old places close their doors, new favorites emerge.
    — The New Yorker, New Yorker, 16 Oct. 2026
Definition of tremendous
Adjective
  • But the expansion of Bioko's strategy presents formidable challenges, from porous international borders to the sheer scale of the territory.
    — ABC News, ABC News, 18 Oct. 2026
  • Although a small number of peptide medicines are already available as pills, most candidates still face formidable barriers to oral delivery.
    — Samantha Agate, Kansas City Star, 16 Oct. 2026
Definition of formidable
Adjective
  • The Board leverages the visual engagement potential of a gigantic iPad with the appealing tactility of board games.
    — Kevin Cortez, Time, 15 Oct. 2026
  • M'Baku is the leader of the Jabari tribe, a Wakandan community that worships a gigantic white gorilla deity.
    — Sohini Sarah Pillai, The Conversation, 14 Oct. 2026
Definition of gigantic

Browse Nearby Words

herbs
herculean
herd
See all Nearby Words

Podcast

Cite this Entry

“Herculean.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/herculean. Accessed 21 Oct. 2026.

Copy Citation
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Last Updated: - Updated example sentences

More from Merriam-Webster

Word of the Day

Listen to the pronunciation of jilt

See Definitions and Examples »

Popular in Grammar & Usage

See More

Merriam-Webster’s Great Big List of Words You Love to Hate

'Can' vs. 'May'

'Affect' vs. 'Effect'

More Commonly Mispronounced Words

Is it 'nerve-racking' or 'nerve-wracking'?
See More

Popular in Wordplay

See More

The Longest Long Words List

9 Words That Sound Like Insults But Aren't

Did 'orange' the fruit or the color come first?

Even More Bird Names that Sound Like Insults (and Sometimes Are)

12 Lovely and Unusual Words for the Natural World
See More

Popular

See More

Merriam-Webster’s Great Big List of Words You Love to Hate

The Longest Long Words List

9 Words That Sound Like Insults But Aren't
See More

Games & Quizzes

See All
Play Quordle: Guess all four words in a limited number of tries. Each of your guesses must be a real 5-letter word.
Quordle Can you solve 4 words at once?
Play Blossom: Solve today's spelling word game by finding as many words as you can using just 7 letters. Longer words score more points.
Blossom Pick the best words!
Play Missing Letter: a crossword with a twist. Each of the 25 puzzle words start with a different letter of the alphabet. Which letter is missing?
The Missing Letter A daily crossword with a twist
artwork of illustrated limes with the text limes and smile with an arrow connecting the two words
Quiz: Spot the Anagram! Scramble these words to find new words with the e...
See All