Arduous

arduous means requiring great , laborious,difficult- for ex n arduous undertaking... ...
Found on http://en.wikipedia.org/wiki/Arduous

Arduous

• (a.) Steep and lofty, in a literal sense; hard to climb. • (a.) Attended with great labor, like the ascending of acclivities; difficult; laborious; as, an arduous employment, task, or enterprise.
Found on http://thinkexist.com/dictionary/meaning/arduous/

arduous

strenuous adjective 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
Found on https://www.encyclo.co.uk/local/20974

arduous

backbreaking adjective characterized by toilsome 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 ...
Found on https://www.encyclo.co.uk/local/20974

Arduous

Ar'du·ous adjective [ Latin arduus steep, high; akin to Ir. ard high, height.] 1. Steep and lofty, in a literal sense; hard to climb. « Those arduous paths they trod. Pope. » 2. Attended with great labor, like the ascending of acclivities; di...
Found on http://www.encyclo.co.uk/webster/A/117

arduous

characterized by effort to the point of exhaustion
Found on https://www.vocabulary.com/lists/148703

arduous

characterized by effort to the point of exhaustion
Found on https://www.vocabulary.com/lists/285407

arduous

characterized by effort to the point of exhaustion
Found on https://www.vocabulary.com/lists/388538

arduous

difficult to do; laborious; onerous; using much energy; strenuous.
Found on https://www.cliffsnotes.com/literature/f/frankenstein/study-help/full-gloss

arduous

steep difficult ascent laborious 
Found on http://www.graduateshotline.com/list.html

arduous

[adj] - characterized by toilsome effort to the point of exhaustion 2. [adj] - taxing to the utmost 3. [adj] - difficult to accomplish
Found on http://www.webdictionary.co.uk/definition.php?query=arduous
No exact match found