Arduous

Adjective

 * 1) Needing or using up much energy; testing powers of endurance.
 * 2) Difficult or exhausting to traverse.

Adverbs for Arduous
relatively; tremendously; overwhelmingly; formidably; unbelievably; supremely; gravely; seriously; administratively; physically; obviously; naturally; peculiarly; necessarily;unpleasantly; conspicuously; alarmingly; dishearteningly; incredibly; Intricately; embarrassingly; perplexingly; complexly; desperately; perversely; occasionally.

Thesaurus
abrupt; abstruse; backbreaking; brutal; burdensome; complex; critical; crushing; delicate; demanding; difficile; difficult; effortful; energetic; exacting; exhausting; fatiguing; forced; formidable; grueling; hairy; hard; heavy; hefty; intricate; jawbreaking; killing; knotted; knotty; labored; laborious; mean; no picnic; not easy; onerous; operose; oppressive; painful; precipitate; precipitous; punishing; rigorous; rough; rugged; set with thorns; severe; sheer; sideling; spiny; steep; stickle; strained; strenuous; taxing; thorny; ticklish; tiring; toilsome; tough; tricksy; tricky; troublesome; trying; uphill; vigorous; wearisome; wicked

Etymology
From arduus:, akin to Irish ard:.

Synonyms

 * burdensome
 * demanding
 * exhausting


 * fatiguing
 * laborious
 * onerous


 * strenuous
 * wearisome

Translations

 * Bulgarian: труден, усилен, мъчен
 * Croatian:, mukotrpna,
 * Dutch:, ,
 * Finnish:, , , ,
 * French:
 * German: ,,
 * Hungarian: megerőltető,, fáradságos


 * Italian: ,
 * Norwegian: slitsom, vanskelig
 * Russian: напряжённый, ,
 * Spanish:, riguroso
 * Swedish: arbetsam, besvärlig, jobbig, ansträngande, avancerad, krånglig, svår, jobbig
 * Turkish: ağır, çetin, gayretli, güç, zor


 * Bulgarian: стръмен, недостъпен
 * Dutch:, , , moeilijk te beklimmen
 * Finnish: ,
 * German:
 * Italian: ,


 * Norwegian: vanskelig
 * Russian:, труднодоступный
 * Spanish:
 * Swedish: brant, besvärlig
 * Turkish: sarp, çetin