Definition of arduous in English:

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Pronunciation: /ˈärjo͞oəs/


Involving or requiring strenuous effort; difficult and tiring: an arduous journey
More example sentences
  • Approach difficult people and arduous tasks with a light and positive attitude.
  • Thanks to everyone who gave their time and effort to the arduous task.
  • It had been a long and arduous journey from her home in Scotland and she was weary to her bones.
onerous, taxing, difficult, hard, heavy, laborious, burdensome, strenuous, vigorous, back-breaking;
demanding, tough, challenging, formidable;
exhausting, tiring, punishing, grueling;
uphill, steep
informal killing



Pronunciation: /ˈärjəwəslē/
Example sentences
  • Labor specialists agree that while most job candidates tend arduously to minute details regarding their resume and/or their appearance, they often overlook the significance of using language correctly.
  • To compete successfully in these events, runners must train arduously and consistently, be agile and maintain a strategy for the race.
  • This kind of cataloging requires mental stamina; overall, he has carefully and arduously selected suitable entries.


Pronunciation: /ˈärjo͞oəsnəs/
Example sentences
  • The reunion is imperilled by the physical arduousness of the journey, the boys' suspicions about the father's true motives and the volatile dynamics among the three.
  • However, the arduousness of this process, and the attempts to block it, should not be forgotten.
  • Nothing daunted, Theroux embarked last year on a journey of astonishing arduousness.


Mid 16th century: from Latin arduus 'steep, difficult' + -ous.

For editors and proofreaders

Syllabification: ar·du·ous

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