1. 
   Defatigable
   De·fat'i·ga·ble adjective [ See Defatigate .] Capable of being wearied or tired out. [ R.] Glanvill.
   Found op http://www.encyclo.co.uk/webster/D/22
   
   
2. 
   Defatigable
   • (a.) Capable of being wearied or tired out.
   Found op http://thinkexist.com/dictionary/meaning/defatigable/
   
   
3. 
   defatigable
   1) Capable of being wearied or tired out
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/defatigable/1
   
   

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