definitions

arduous

[ ahr-joo-uhs or, esp. British, ahr-dyoo- ]
/ ˈɑr dʒu əs or, esp. British, ˈɑr dyu- /
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SEE MORE SYNONYMS FOR arduous ON THESAURUS.COM

adjective

requiring great exertion; laborious; difficult: an arduous undertaking.
requiring or using much energy and vigor; strenuous: making an arduous effort.
hard to climb; steep: an arduous path up the hill.
hard to endure; full of hardships; severe: an arduous winter.

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RELATED WORDS

predicament, complication, dilemma, hardship, hazard, snag, obstacle, struggle, frustration, pain, trouble, deadlock, crisis, adversity, distress, strait, hitch, obstruction, perplexity, quagmire

Nearby words

ardipithecus ramidus, ardmore, ardor, ardour, ards, arduous, ardèche, are, area, area bombing, area code

Origin of arduous

1530–40; < Latin arduus erect, steep, laborious; see -ous

Related forms

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for arduousness

British Dictionary definitions for arduousness

arduous

/ (ˈɑːdjʊəs) /

adjective

requiring great physical or mental effort; difficult to accomplish; strenuous
hard to endure; harsharduous conditions
hard to overcome or surmount; steep or difficultan arduous track

Derived Forms

arduously, adverbarduousness, noun

Word Origin for arduous

C16: from Latin arduus steep, difficult
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