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Definition of arduous

arduous

/ˈɑːr.dʒu.əs/
ar · du · ous
Adverb:arduously
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arduous Lexical Profile

arduous Game Scores & Validity

• adjective

1

Involving or requiring strenuous effort; difficult and tiring to accomplish or endure.

Example

"The researchers completed the arduous journey across the mountain range to collect geological samples."

2

Steep, lofty, and difficult to ascend (of a path, hill, or terrain).

Example

"Hikers paused halfway up the arduous slope to catch their breath and admire the valley below."

Synonyms
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Antonyms
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• Nearby Words

ardent
ardently
ardor
arduous
arduously
arduousness
are

Word Origin & Etymology

Borrowed in the mid-16th century from Latin arduus, meaning 'high, steep, or lofty,' and figuratively 'difficult to reach or accomplish.'

Cite this Entry

Wordmom. (2026). Definition of Arduous. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/arduous
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