1. 
   Impacable
   Im·pa'ca·ble adjective [ Latin prefix im- not + pacare to quiet. See Pacate .] Not to be appeased or quieted. [ Obsolete] Spenser. -- Im*pa'ca*bly , adverb
   Found op http://www.encyclo.co.uk/webster/I/15
   
   
2. 
   Impacable
   • (a.) Not to be appeased or quieted.
   Found op http://thinkexist.com/dictionary/meaning/impacable/
   
   
3. 
   impacable
   1) Not to be appeased or quieted
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/impacable/1
   
   

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