The AI-powered English dictionary
comparative more arduous, superlative most arduous
Needing or using up much energy; testing powers of endurance. quotations examples
Chelsea survived and can now turn their attentions to the Champions League final against Bayern Munich in Germany later this month as they face an increasingly arduous task to finish in the Premier League's top four.
2012 May 5, Phil McNulty, “Chelsea 2-1 Liverpool”, in BBC Sport
(obsolete) burning; ardent quotations
Where flames the arduous Spirit of Isidore.
1805-1814, Dante, Henry Francis Cary (translator), The Divine Comedy
Difficult or exhausting to traverse. quotations examples
Beyond the river, an arduous slope rises 3286 feet in 13 miles.
1974, Sue Bowder, The American biking atlas & touring guide, page 77
Mike looked up from the arduous mountain trail. They'd been climbing for five hours and he was beginning to feel irritable.
1999, Scott Ciencin, Mike Fredericks, Dinoverse
Survivor reaches as many as 28 million viewers who watch contestants win a new Pontiac or guzzle Mountain Dew after scaling an arduous cliff.
2006, Jack W. Plunkett, Plunkett's Entertainment & Media Industry Almanac 2006