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 That move also let Apple Home work with more devices from more manufacturers (previously, it was limited to those willing to go through the often arduous HomeKit approval process). — Jennifer Pattison Tuohy, The Verge, 12 Oct. 2026 The summit push After weeks of arduous climbing, Singh led a six-man team, including Morup, Paljor and Smanla above the final camp located at 8,300 meters (27,000 feet). — Helen Regan, CNN Money, 10 Oct. 2026 The Lincoln is the second carrier that has endured an unusually long and arduous deployment to support the war against Iran and the second to receive the top unit award afterward. — ABC News, 7 Oct. 2026 The organization shared a glimpse into the arduous recovery mission on social media. — Madison E. Goldberg, PEOPLE, 2 Oct. 2026 See All Example Sentences for arduous

Recent Examples of Synonyms for arduous

Adjective

Jarman, who came in as the defending champion on the event, put together a more difficult routine but was nicked by judges for his execution.

— ABC News, ABC News, 24 Oct. 2026
This is the last remaining game on the schedule that should be very difficult.

— David Troy OutKick, FOXNews.com, 24 Oct. 2026

Definition of difficult

Adjective

Such calculations are part of a wider effort to understand why molecular simulations remain challenging.

— Rupendra Brahambhatt, Interesting Engineering, 24 Oct. 2026
But the shift in college athletics has required an internal reconciling that is even more challenging than the external education.

— Dana O’Neil, CNN Money, 24 Oct. 2026

Definition of challenging

Adjective

The case has led to calls for tougher oversight of churches and other religious organizations in a country where religious faith plays a prominent role in public life.

— Jefferson Kahinju Reuters, Arkansas Online, 20 Oct. 2026
Thermal equilibrium might sound like a tough concept, but hundreds of systems reach them around us on a daily basis.

— Ameya Paleja, Interesting Engineering, 20 Oct. 2026

Definition of tough

Adjective

And as routine tasks are automated, workers could lose opportunities to develop the experience needed for more demanding work.

— Lindsay Dodgson, CNBC, 24 Oct. 2026
The Sun enters your 12th House, drawing your attention toward rest, reflection, privacy, unfinished matters, and everything easier to hear when the outside world becomes less demanding.

— Tarot.com, New York Daily News, 23 Oct. 2026

Definition of demanding

Adjective

Like SpaceX and Tesla CEO Elon Musk, many founders in tech have moonshot performance pay packages, in which rigorous stock price growth is tied to massive pay hurdles.

— Amanda Gerut, Fortune, 21 Oct. 2026
Every travel story is based on rigorous reporting by our team of expert writers and editors with extensive knowledge of travel products.

— Liz Knueven, CNBC, 21 Oct. 2026

Definition of rigorous

Adjective

In a century where the lives of billions are defined by chronic disease, demographic change, and digital systems, China has become one of the central proving grounds for some of the hardest issues in global health.

— Ruby Wang, semafor.com, 27 Oct. 2026
Next year's public spending review — when the government sets future budgets for departments and public services — could be even harder for lawmakers who appear averse to any cuts.

— Ian King, CNBC, 27 Oct. 2026

Definition of hard

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arduously

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“Arduous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/arduous. Accessed 27 Oct. 2026.

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