In Arthur Miller's The Crucible, John Proctor states, "I have fought here three long years to bend these stiff-necked people to me, and now... you will not judge me more, Elizabeth. I have good reason to think that you will not judge me at all. I have fought against my own thoughts, I have fought against my own family, and now I will not let you judge me in my own house! This is calumny."
What does the term "calumny" mean?