arduous

[ahr-joo-uhs or, esp. British, ahr-dyoo-]
adjective
1.
requiring great exertion; laborious; difficult: an arduous undertaking.
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.

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

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


1. hard, toilsome, onerous, wearisome, burdensome, exhausting.


1. easy.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
arduous (ˈɑːdjʊəs)
 
adj
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
 
[C16: from Latin arduus steep, difficult]
 
'arduously
 
adv
 
'arduousness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

arduous
1530s, "high, steep, difficult to climb," from L. arduus "high, steep," from PIE base *eredh- "to grow, high" (see ortho-). Metaphoric extension to "difficult" first attested 1713.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
They laid down the things they had so arduously carried to this remote sanctum.
There is no position at which fans are clamoring more arduously to see a big-name free agent brought in than at wide receiver.
The experience and the knowledge, so arduously compiled, wanes over time and is largely forgotten by those who follow us.
There are always teams of individuals working arduously to address issues and problems and offer mitigations or solutions.
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