Antonyms for "give a voice to" can include "silence," "mute," "suppress," "stifle," and "repress." When we give a voice to someone or something, we offer them the opportunity to express themselves and their opinions freely. On the other hand, keeping someone quiet, or muting them, can occur for various reasons such as censorship, oppression, or simply disregarding their voice. Suppressing or stifling someone's voice implies preventing them from expressing themselves and their thoughts, at times through intimidation or even violence. Repressing can also entail denying someone the ability to speak out freely, or forcing them to suppress what they truly want to say.