[v] speak out against; "He denounced the Nazis"
[v] give away information about somebody; "He told on his classmate who had cheated on the exam"
[v] announce the termination of, as of treaties
[v] 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"
betray, brand, give away, grass, mark, peach, rat, shit, shop, snitch, stag, stigmatise, stigmatize, tell on