1. 
   unintelligibly
   [adv] - in an unintelligible manner
   Found op http://www.webdictionary.co.uk/definition.php?query=unintelligibly
   
   
2. 
   unintelligibly
   ununderstandably adverb in an unintelligible manner; `the foreigners spoke unintelligibly`
   Found op http://wordnetweb.princeton.edu/perl/webwn?s=unintelligibly
   
   
3. 
   unintelligibly
   1) In an unintelligible manner 2) Inconceivably 3) Inexplicably 4) Perplexingly 5) Unfathomably 6) Ununderstandably
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/unintelligibly/1
   
   

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