Sentence:  A cold wind swept down from it and set us shivering. Somewhere there, on that desolate plain, was lurking this fiendish man, hiding in a burrow like a wild beast, his heart full of <WSD>malignancy</WSD> against the whole race which had cast him out. 
Meaning of the word marked with <WSD> tags:  That which is malign; evil, depravity, malevolence.