adj. requiring great exertion; laborious; difficult
He prepared for weeks to undertake the arduous climb.
He prepared for weeks to undertake the arduous climb.
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The three kids began the long, arduous climb back up to Argo Manor.
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''Our journey was arduous and slow.'' What does 'arduous' mean?
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hard; serious; tall; tough; uphill
easy
3 syllables
ar-du-ous
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