Sentence:  In regard to Eichmann , it was to be found in the Nazi outlook , which contained a principle separate from and far worse than anti-Semitism , a <WSD>principle</WSD> by which the poison of anti-Semitism itself was made more virulent . 
Meaning of the word marked with <WSD> tags:  a basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct