When we talk about the phrase "lifting a voice," it usually refers to shouting, yelling or raising one's voice. But, occasionally, we may want to tone down the conversation or communication while still conveying a message. In such cases, the antonyms for "lifting a voice" might be whispering, murmuring, muttering or speaking softly, calmly, or gently. Whispering involves speaking in hushed tones, muttering is speaking under one's breath, while murmuring is a soft and indistinct sound. On the other hand, speaking softly or gently refers to using a lower or calmer pitch of the voice. Therefore, antonyms of "lifting a voice" can change the tone and meaning of communication, which plays an essential role in effective interactions.