• WordNet 3.6
    • adj arduous difficult to accomplish; demanding considerable mental effort and skill "the arduous work of preparing a dictionary"
    • adj arduous characterized by effort to the point of exhaustion; especially physical effort "worked their arduous way up the mining valley","a grueling campaign","hard labor","heavy work","heavy going","spent many laborious hours on the project","set a punishing pace"
    • adj arduous taxing to the utmost; testing powers of endurance "his final, straining burst of speed","a strenuous task","your willingness after these six arduous days to remain here"- F.D.Roosevelt"
    • ***
Webster's Revised Unabridged Dictionary
    • Arduous Attended with great labor, like the ascending of acclivities; difficult; laborious; as, an arduous employment, task, or enterprise.
    • Arduous Steep and lofty, in a literal sense; hard to climb. "Those arduous paths they trod."
    • ***
Century Dictionary and Cyclopedia
    • arduous Steep, and therefore difficult of ascent; hard to climb.
    • arduous Attended with great labor, like the ascent of acclivities; difficult.
    • arduous Hence—3. Energetic; laborious: said of persons or actions: as, an arduous student; arduous struggles. Synonyms Difficult, Hard, Arduous, laborious, toilsome, herculean, severe. Difficult means not easy, attended with obstacles, requiring work, but possible by faithful effort and perseverance: as, a difficult problem, question, task, or case in surgery. Hard suggests work, like that of digging up hard ground, or breaking through hard rock; it is stronger than difficult. It may also apply to passive suffering: as, a hard fate. What is arduous requires more energy and endurance, and is less within the reach of common powers, than what is hard. Its primitive meaning of steep climbing is still felt in it, and makes it suggestive of severe and protracted effort.
    • ***
Chambers's Twentieth Century Dictionary
    • adj Arduous ärd′ū-us deep, difficult to climb: difficult to accomplish: laborious
    • ***


  • Ovid
    “I attempt an arduous task; but there is no worth in that which is not a difficult achievement.”
  • Gilbert K. Chesterton
    “True contentment is a thing as active as agriculture. It is the power of getting out of any situation all that there is in it. It is arduous and it is rare.”
  • George Bernard Shaw
    “Peace is not only better than war, but infinitely more arduous”


Webster's Revised Unabridged Dictionary
L. arduus, steep, high; akin to Ir. ard, high, height
Chambers's Twentieth Century Dictionary
L. arduus, high; cog. with Celt. ard, high.


In literature:

The labor connected with the feeding of furnaces with coke and cleaning fires from clinker is of a very arduous and heavy nature.
"Scientific American Supplement, No. 586, March 26, 1887" by Various
Such a step is obviously only the first move in what must necessarily be a long and arduous operation.
"The Loves of Krishna in Indian Painting and Poetry" by W. G. Archer
For the arduous work that awaited Miss Anthony her years of young womanhood had given preparation.
"Eighty Years And More; Reminiscences 1815-1897" by Elizabeth Cady Stanton
This is indeed an arduous Task; but it should comfort a glorious Spirit that it is the highest Step to which human Nature can arrive.
"The Spectator, Volumes 1, 2 and 3" by Joseph Addison and Richard Steele
Upon hearing this unwelcome news, Charles began the arduous task of collecting another army.
"Yolanda: Maid of Burgundy" by Charles Major
No duty was too arduous or too dangerous for the Irish Brigades.
"The Glories of Ireland" by Edited by Joseph Dunn and P.J. Lennox
I welcome you to arduous duties and grave responsibilities.
"The History Of University Education In Maryland" by Bernard Christian Steiner
Miss Gunnill's two principal admirers had an arduous task to perform.
"Odd Craft, Complete" by W.W. Jacobs
Beyond this we got into the rocks and climbing became arduous.
"Tales of lonely trails" by Zane Grey
The operations which resulted in the capture of Harper's Ferry had been arduous in the extreme.
"Stonewall Jackson And The American Civil War" by G. F. R. Henderson
The egoists may be the martyrs of a nobler dispensation, agonizing for a more arduous ideal.
"The Defendant" by G.K. Chesterton
He felt unprepared as yet for the more arduous task he had set before himself.
"The Poetical Works of William Wordsworth, Vol. III" by William Wordsworth
Then we went back to the hotel, intending to lie down and rest after such an arduous day.
"As Seen By Me" by Lilian Bell
This was an arduous and delicate duty.
"The Water-Witch or, The Skimmer of the Seas" by James Fenimore Cooper
The duty which these gentlemen performed was arduous in the extreme.
"A Compilation of the Messages and Papers of the Presidents: Tyler" by Compiled by James D. Richardson
His Breton sailor, Herve Riel, has more than a touch of the Heraclean frankness of gaiety in arduous effort.
"Robert Browning" by Edward Dowden
Throughout, the ascending and descending tones, close interwoven, give a blended hue of arduous striving and regret.
"Symphonies and Their Meaning; Third Series, Modern Symphonies" by Philip H. Goepp
This work in itself has been arduous.
"Eugene Field, A Study In Heredity And Contradictions" by Slason Thompson
Then came a series of cascades and falls and a most arduous portage of the heavy canoe.
"Pioneers in Canada" by Sir Harry Johnston
The regulation of the Protestant cult in France was a far less arduous task.
"The Life of Napoleon I (Volumes, 1 and 2)" by John Holland Rose

In poetry:

All hot and grimy from the road,
Dust gray from arduous years,
I sat me down and eased my load
Beside the Fount of Tears.
"The Fount Of Tears" by Paul Laurence Dunbar
"Will no famed chief support this generous maid?
Once more the patriot's arduous path resume?
And, comely from his native plains array'd,
Speak future glory to the British loom?
"Elegy XVIII. He Repeats the Song of Colin, a Discerning Shepherd" by William Shenstone
The treadmill round of duties that
Makes any life inane and flat,
Without diversion sandwiched in,
The drudgery, the overplus
Of toil and trouble arduous,
Were rugged discipline.
"Never Had A Chance" by Hattie Howard
Arduous and trying was the work the British had to do,
Yet with a hearty goodwill they to it flew;
While the tropical sun on them blazed down,
But the poor soldiers wrought hard and didn't frown.
"The Capture of Havana" by William Topaz McGonagall
Thou, too, hast heard the slave-whip's poignant crack,
The sound of avarice and turpitude,
As hands unwilling plied their arduous task,
Creating monuments to iron will,
Human injustice, greed and servitude.
"Metabole." by Alfred Castner King
Slow-moving and with fluttering heart,
The youthful matron onward passed
To where that masterpiece of art
Repaid her arduous toil at last;
As, gazing through a mist of tears,
She realized here the dream of years.
"The Gift Of Juno" by John Lawson Stoddard

In news:

It is nice to see the volunteers rewarded for their arduous, decades-long effort.
AutoLISP routine makes short work of an otherwise arduous task.
"Interior With Goldfish," left, is paired with "Goldfish and Palette" in the Museum of Modern Art's Matisse show, which offers a close reading of four of the most arduous years of his career.
The 2012-13 season is still young, but network execs and media buyers are gearing up for what could be an arduous upfront advertising sales derby next summer.
Researchers say trying to resist modern-day media is an extremely arduous task.
Hikers undertaking an arduous climb or a particularly long trek know that each step brings them closer to a place to rest and enjoy a drink of water.
Lynde says the process of setting up the partnership was "arduous.".
Shelling pecans is labor intensive, arduous and just plain frustrating.
From guns to laptops,Philippine peace faces arduous road.
Between June and August each year, Hindu pilgrims complete the Amarnath Yatra, an arduous trek to a holy cave high up in the Himalayan glaciers near the border with Pakistan, in Indian-controlled Kashmir.
But what we don't see are the arduous preparations that take place behind the scenes as coaches help contestants choose songs and polish performances before they take the stage in front of millions of viewers.
For many people who lived in metro New Orleans when Hurricane Katrina struck, the road to recovery has been long and arduous.
The built-in battery can last for up to four hours of arduous filing, and the motor has a speed of 20,000 RPM.
Veterans and their advocates who have submitted claims for compensation and pension are aware that it is a long, often arduous process with uncertain results.
According to Senator Chuck Schumer, the federal government will soon begin the arduous task of returning floodwaters back to the Atlantic Ocean after Hurricane Sandy's surge flooded key transportation arteries earlier this week.

In science:

On the other hand, if the unique features of Nature cannot be recovered by a sort of generic process the road to understanding will be very long and arduous.
Is Nature Generic?
Because it is arduous to carry out an analytical approach by using the Hill’s criterion, it may be relevant to deal with a probabilistic formulation of the criterion (22).
Clusters in Simple Fluids
However we choose to sidestep this arduous, albeit mechanical, computation.
Additive functionals on random search trees
However, maintenance of knowledge bases are arduous tasks (Menzies 1999), some of it are not even computable (Debenham 2003). Now, let us consider the problem from the TOKM perspective.
On challenges and opportunities of designing integrated IT platforms for supporting knowledge works in organizations
Furthermore, this arduous labor may very well go unrewarded.
Compression Rate Method for Empirical Science and Application to Computer Vision
Life in a modern Antarctic station is certainly no luxury experience, but it is not arduous either.
Astronomy in Antarctica
Since the analysis is somewhat arduous and may not be of interest to all readers, we have moved the details to the appendix.
Computing multi-point Seshadri constants on P2
For a generic diagram this would be an arduous task, but one that can clearly be accomplished in a finite number of steps.
Review of Theoretical Status: the Long and Short of High Energy Jets
More than any other factor, this provides great hope that the passage from first data to published results may not be too arduous.
Beauty 2006 -- Conference Summary and Future Prospects
Finally, we will strive here to emphasize important points rather than arduous calculations, and at times some arguments will be schematic.
Lectures on Nongeometric Flux Compactifications
It is a curious fact that there are two ways to get equation (3) (spectral sequence, and detailed component calculation), and both of them are quite arduous, although the result is a simple one.
Introduction to the BRS Cohomology of the Massless Wess Zumino Model: Cybersusy II
This is too often an arduous process that requires effective interaction among all participants.
How to Make an Atomic Blog in Your Own Kitchen. Summary of the Workshop: Uncertainties in Atomic Data and How They Propagate in Chemical Abundances
Although this is a needlessly arduous way to arrive at the simple formula, S = R √−2mV dx in the onedimensional case, it is the procedure that can be generalized to higher dimensions.
Euclidean Maxwell-Einstein Theory
One of the most arduous problems in perturbative QDC is the the analysis of processes involving incoming hadrons in the region Λ ≪ Q ≪ √s where Q is the hard scale and √s the c.m. energy of the process.
QCD and high energy hadronic interaction: Summary talk (theory)
Beyond this admittedly rather drab result, it is somewhat arduous to characterize the class of deterministic GILs.
Graph Interpolation Grammars as Context-Free Automata