denounce
     v 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" [syn: {stigmatize}, {stigmatise}, {brand}, {mark}]
     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" [syn: {tell on}, {betray},
         {give away}, {rat}, {grass}, {shit}, {shop}, {snitch}, {stag}]
Source: WordNet® 2.0