ARDUOUS Synonyms: 106 Similar and Opposite Words

Q: 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

Q: 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

Q: 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

arduous

adjective

ˈär-jə-wəs

Definition of arduous

as in difficult

requiring considerable physical or mental effort climbing Mount Everest is an arduous, exhausting challenge

Synonyms & Similar Words

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Antonyms & Near Antonyms

as in challenging

requiring much time, effort, or careful attention the arduous task of doing the research for my term paper

Synonyms & Similar Words

Antonyms & Near Antonyms

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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 So Republicans are looking to get parts of it through the arduous reconciliation process that allows both chambers to pass a bill with a simple majority. — Kevin Freking, Fortune, 15 July 2026 In March, Melissa Graybill, 52, watched her mother, who is 69, begin an arduous recovery journey after tripping while getting off a horse. — Erica Sloan, Washington Post, 14 July 2026 But its insistence on seeing the birth of a nation as a dangerous endeavor requiring persistent, even arduous, generosity proves enchanting. — Ben Travers, IndieWire, 9 July 2026 In the weeks since, teams have been clearing the Cape Canaveral launch site of debris and beginning the arduous process of rebuilding. — Eric Lagatta, USA Today, 8 July 2026 See All Example Sentences for arduous

Recent Examples of Synonyms for arduous

Adjective

Unlike dogs, they cannot simply be taken on longer walks, often resist dietary changes, and can be difficult to medicate consistently, making GLP-1 therapies potentially attractive if clinical trials prove successful.

— Elsa Ohlen,Carolin Roth, CNBC, 18 July 2026
Their stories recount the devastation to homes and businesses, life in temporary shelters, and the difficult process of rebuilding or relocating.

— Michelle Oliva-Espinosa, Kansas City Star, 18 July 2026

Definition of difficult

Adjective

The method also relies on multiple Bell tests and assumptions about independent quantum sources, which could make large-scale implementation challenging.

— Rupendra Brahambhatt, Interesting Engineering, 18 July 2026
His 15-point first half Thursday included two threes, a high-degree-of-difficulty turnaround jumper and another challenging jumper.

— Barry Jackson, Miami Herald, 17 July 2026

Definition of challenging

Adjective

White, when give the chance, has displayed a diverse offensive game, a defensive bent and an ability to make tough shots.

— Barry Jackson, Miami Herald, 17 July 2026
The stakes for new avatar don’t feel quite as high—the specific circumstances around the former was a perfect storm that'll be tough to duplicate—but the music isn’t any less potent for it.

— Lawrence Burney, Pitchfork, 16 July 2026

Definition of tough

Adjective

Those efforts produced significant performance and efficiency gains for several of the laboratory’s most demanding applications.

— Aamir Khollam, Interesting Engineering, 17 July 2026
Yzerman was known as a demanding, intimidating general manager who could grind players in negotiations.

— Max Bultman, New York Times, 17 July 2026

Definition of demanding

Adjective

For more than two decades, the duo hauled in more than 4 pounds of clams each morning from the lagoon in the Po River Delta — upending the notion that women were unsuited for such a rigorous job.

— Kasha Patel, CNN Money, 18 July 2026
Over the summer, kids might not have had to stick to a rigorous morning routine, but that all changes during the school year.

— Parents, Parents, 17 July 2026

Definition of rigorous

Adjective

Essentially a rock has met a hard place – at the mouth of the Persian Gulf.

— Tim Lister, CNN Money, 20 July 2026
Remember, all this hard work to discover all these things has been done in the midst of designing a ballroom, cleaning up the reflecting pool and a host of other busy things the president and his administration have been doing.

— Letters to the Editor, The Orlando Sentinel, 19 July 2026

Definition of hard

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ardor

arduous

arduously

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“Arduous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/arduous. Accessed 21 Jul. 2026.

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Synonyms of arduous

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