Sentence:  For three causes Duke William entered this land to subdue Harold. One was, for that it was to him given by King Edward his nephew. The second was, to take <WSD>wreak</WSD> for the cruel murder of his nephew Alfred, King Edward's brother, and of the Normans, which deed he ascribed chiefly to Harold. 
Meaning of the word marked with <WSD> tags:  Revenge; vengeance; furious passion; resentment.