1. 
   rigorously
   [adv] - in a rigorous manner
   Found op http://www.webdictionary.co.uk/definition.php?query=rigorously
   
   
2. 
   rigorously
   adverb in a rigorous manner; `he had been trained rigorously by the monks`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=rigorously
   
   
3. 
   rigorously
   1) In a rigorous manner 2) Strictly
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/rigorously/1
   
   

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