1. 
   arduous
   steep difficult ascent laborious 
   Found op http://www.graduateshotline.com/list.html
   
   
2. 
   arduous
   [adj] - characterized by toilsome effort to the point of exhaustion 2. [adj] - taxing to the utmost 3. [adj] - difficult to accomplish
   Found op http://www.webdictionary.co.uk/definition.php?query=arduous
   
   
3. 
   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 ...
   Found op http://www.encyclo.co.uk/webster/A/117
   
   
4. 
   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`; `...
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=arduous
   
   
5. 
   arduous
   adjective difficult to accomplish; demanding considerable mental effort and skill; `the arduous work of preparing a dictionary`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=arduous
   
   
6. 
   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.Roos...
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=arduous
   
   
7. 
   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 op http://thinkexist.com/dictionary/meaning/arduous/
   
   
8. 
   Arduous
   arduous means requiring great , laborious,difficult- for ex n arduous undertaking... ...
   Found op http://en.wikipedia.org/wiki/Arduous
   
   
9. 
   arduous
   1) Backbreaking 2) Burdensome 3) Demanding 4) Difficult 5) Effortful 6) Grueling 7) Gruelling 8) Hard 9) Heavy 10) Herculean 11) Laborious 12) Lengthy 13) Painstaking 14) Protracted 15) Punishing...
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/arduous/1
   
   

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