Sentence:  The foregoing [United States Supreme Court] cases suggest that specific guarantees in the Bill of Rights have <WSD>penumbras</WSD>, formed by emanations from those guarantees that help give them life and substance. 
Meaning of the word marked with <WSD> tags:  Something related to, connected to, and implied by, the existence of something else that is necessary for the second thing to be full and complete in its essential aspects.