What is the meaning of the word “denounce” from the same passage?

“In a way, to be indifferent to that suffering is what makes the human being inhuman. Indifference, after all, is more dangerous than anger and hatred. Anger can at times be creative. One writes a great poem, a great symphony. One does something special for the sake of humanity because one is angry at the injustice that one witnesses. But indifference is never creative. Even hatred at times may elicit a response. You fight it. You denounce it. You disarm it.”

What is the meaning of the word “denounce” from the same passage?