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Synonym Chooser

How is the word arduous different from other adjectives like it?

The words difficult and hard are common synonyms of arduous. While all three words mean "demanding great exertion or effort," arduous stresses the need of laborious and persevering exertion.

the arduous task of rebuilding

When could difficult be used to replace arduous?

While in some cases nearly identical to arduous, difficult implies the presence of obstacles to be surmounted or puzzles to be resolved and suggests the need of skill or courage.

the difficult ascent of the mountain

When is it sensible to use hard instead of arduous?

The synonyms hard and arduous are sometimes interchangeable, but hard implies the opposite of all that is easy.

farming is hard work

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 arduous Hikers camping here will have several trails to choose from, including arduous but rewarding treks to Caribou Lakes, the Yellow Rose Mine or Ward Lake. Jaclyn Cosgrove, Los Angeles Times, 10 June 2025 This process can be arduous, so fortunately, couples don’t have to go through it alone. Elizabeth Ayoola, Essence, 5 June 2025 Our experience through the adoption process was arduous. Brian Davids, HollywoodReporter, 4 June 2025 His role in Hercules' narrative is not just supporting but paramount to the hero's completion of several of his most arduous challenges (good luck beating half of those monsters without Peggy). Ew Staff, EW.com, 27 May 2025 See All Example Sentences for arduous
Recent Examples of Synonyms for arduous
Adjective
  • This moderately difficult, half-mile trail through the Mission Hills Open Space, is located across from Pioneer Park.
    Maura Fox, San Diego Union-Tribune, 23 June 2025
  • Attorney Nicole Blank Becker, who represents R. Kelly, told Fox News Digital that jurors, just like anyone else, have a difficult time separating emotions from charges.
    Tracy Wright , Lauryn Overhultz, FOXNews.com, 23 June 2025
Adjective
  • As such, piloting an FPV drone is a completely different, entirely more challenging kettle of fish than piloting a standard camera drone.
    Sam Kieldsen, Wired News, 27 June 2025
  • All of these factors combine to make AI adoption incredibly challenging, expensive and time-consuming.
    Dave Friend, Forbes.com, 27 June 2025
Adjective
  • Even these young players already have major tournament experience — a huge strength given their tough group.
    Megan Feringa, New York Times, 28 June 2025
  • Nor is anything that tough necessary to prevent chronic illness.
    Carolyn Rosenblatt, Forbes.com, 27 June 2025
Adjective
  • Further stymying manufacturing’s renaissance is that plant work isn’t just dirty and physically demanding – albeit less than in prior generations – but also relatively low-paying with limited career prospects.
    Ryan Craig, Forbes.com, 27 June 2025
  • But the plaintiffs in the case and the Biden administration said the appeals court was wrong to apply that standard and should have instead analyzed it under the most demanding level, strict scrutiny, because the law impedes adults' access to speech protected by the Constitution.
    June 27, CBS News, 27 June 2025
Adjective
  • The next afternoon, Gomes sat in and watched Ohtani throw a rigorous bullpen session to simulate multiple innings.
    Fabian Ardaya, New York Times, 17 June 2025
  • Adopt a zero-trust security model that emphasizes rigorous access rules and constant authentication.
    Rob Lydic, Forbes.com, 17 June 2025
Adjective
  • Sandoval has received some pay bumps, including a temporary $10,000-a-year bonus for Hawaii special education teachers designed to alleviate shortages in that and other hard-to-staff areas.
    Alia Wong, USA TODAY, 14 Feb. 2023
  • Whether those numbers are an overstatement, or possibly an understatement, is hard to say.
    Lance Eliot, Forbes, 13 Feb. 2023
Adjective
  • But Martone is one of the very best prospects in this draft and gives the Flyers size, high-end skill (he’s got plus traits as a shooter, handler and playmaker), and a formidable one-two punch at right wing with Matvei Michkov.
    Scott Wheeler, New York Times, 27 June 2025
  • The actress portrayed formidable sensei Kim Da-Eun on the Netflix series that ended in February after six seasons.
    Raechal Shewfelt, EW.com, 26 June 2025

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Cite this Entry

“Arduous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/arduous. Accessed 1 Jul. 2025.

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