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adjective

arduous

CEFR C2

involving or requiring strenuous effort; difficult and tiring

In a sentence

Six example sentences with arduous, each labelled with its topic.

  • The final week of marathon training was so arduous that runners slept nine hours and still woke sore.

    Fitness

  • Crossing the ridge on foot proved arduous, and the group needed two full days plus a rest stop.

    Travel

  • Building the canal was arduous work that consumed a decade of labor and defeated two earlier engineering companies.

    History

  • Isolating the enzyme was arduous, requiring six months of failed purifications before a single clean sample appeared.

    Science

  • The arduous work of finding the first hundred customers took a year, and nobody on the team slept much.

    Startups

  • Reviewing forty thousand documents for the case was arduous, and the junior associates worked through most weekends.

    Law

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Found in these word lists

Found in 8 published word listsRecognized

Each source is a published word list that contains arduous. No exam board publishes an official GRE, GMAT or SAT list; GMAT words come from GRE lists and the Academic Word List.