1. 
   onerous
   needing effort burdensome 
   Found op http://www.graduateshotline.com/list.html
   
   
2. 
   Onerous
   On'er·ous adjective [ Latin onerosus , from onus , oneris , a load, burden: confer French onéreux .] Burdensome; oppressive. 'Too onerous a solicitude.' I. Taylor. Onerous cause (Scots Law) ,...
   Found op http://www.encyclo.co.uk/webster/O/20
   
   
3. 
   Onerous
   • (a.) Burdensome; oppressive.
   Found op http://thinkexist.com/dictionary/meaning/onerous/
   
   
4. 
   onerous
   onerous (ON uhr uhs, OH nuhr uhs) 1. Representing a great burden or much trouble. 2. Involving obligations that are more disadvantageous than advantageous. 3. Troublesome or oppressive; burdensome. 4. The figuratively heavy load imposed by something irksome or annoying. 5. Having or involving ob...
   Found op http://www.wordinfo.info/words/index/info/view_unit/4075/
   
   
5. 
   onerous
   1) Arduous 2) Burdensome 3) Heavy 4) Needing effort burdensome
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/onerous/1
   
   

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