In the book thief In what ways are WORDS used both positively and negatively in the story?

Throughout the novel,Zusak develops a dichotomy, to opposing or contradictory ideas regarding words;words can be celebratory and used as a force for good, but they can also be used destructively and as a force for evil.write in response to the following idea:In what ways are WORDS used both positively and negatively in the story?