Context Clues

In the book, A Child Called It I read that while David was washing the dishes, his mother was standing behind him with a carving knife while his baby brother Russell was moving back and forth on their mother's left leg. David saw every thing begin to darken and he woke up in the bathroom while his mother was on her knees with a wad of gauze being held to his stomach where dark red blood appeared. David saw everything darken again and when he woke he had found some bandages wrapped around his lower chest.  David's brother Russell said to him, "David's going to die, the boy's going to die

The word that I found the meaning of as a result was Nazi which is someone who watches your every move. David's mother is like the grim reaper waiting to kill her son.