Verb
1. speak out against;
"He denounced the Nazis"2. to accuse or condemn or openly or formally or brand as disgraceful;
"He denounced the government action""She was stigmatized by society because she had a child out of wedlock"3. announce the termination of, as of treaties
4. give away information about somebody;
"He told on his classmate who had cheated on the exam"