|Origin:||denoncier 'to announce', from Latin denuntiare, from nuntiare 'to report'|
to express strong disapproval of someone or something, especially in public [↪ denunciation]:
Amnesty International denounced the failure by the authorities to take action.
denounce somebody/something as something
He denounced the election as a farce.
to give information to the police or other authority about someone's illegal political activities
denounce somebody to somebody
She denounced him to the police.