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arduous

American  
[ahr-joo-uhs, ahr-dyoo-] / ˈɑr dʒu əs, ˈɑr dyu- /

adjective

  1. requiring great exertion; laborious; difficult.

    an arduous undertaking.

    Synonyms:
    exhausting, burdensome, wearisome, onerous, toilsome, hard
    Antonyms:
    easy
  2. requiring or using much energy and vigor; strenuous.

    making an arduous effort.

  3. hard to climb; steep.

    an arduous path up the hill.

  4. hard to endure; full of hardships; severe.

    an arduous winter.


arduous British  
/ ˈɑːdjʊəs /

adjective

  1. requiring great physical or mental effort; difficult to accomplish; strenuous

  2. hard to endure; harsh

    arduous conditions

  3. hard to overcome or surmount; steep or difficult

    an arduous track

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Other Word Forms

  • arduously adverb
  • arduousness noun
  • superarduous adjective
  • superarduously adverb
  • superarduousness noun
  • unarduous adjective
  • unarduously adverb
  • unarduousness noun

Etymology

Origin of arduous

First recorded in 1530–40; from Latin arduus “erect, laborious, steep”

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

His attorneys called an expert who testified that Puig’s arduous journey from his home country caused PTSD.

From Los Angeles Times

Until this moment, standing at the corner of one of the busiest intersections in the city, falling in love had always been for me an arduous process.

From Los Angeles Times

Infantry units are full of older men unfit for arduous combat missions.

From The Wall Street Journal

The gradual return of the hostages over several stages had been a complicated and arduous process for both sides.

From Barron's

City are close to completing the £20m signing of Crystal Palace captain Marc Guehi to bolster their defence, but the arduous schedule now appears to be catching up with their front players.

From BBC