The word "re-echo" refers to the repetition of a sound or phrase. The meaning of the word implies a sense of echoing or reverberation, which suggests a feeling of repetition or resonance. The antonyms for "re-echo" are a bit more challenging to identify, as there are no direct opposites to the word. However, the following words can be considered antonyms to different aspects of "re-echo": silence, one-time, non-repetitive, original, and unique. These words suggest the absence of the repetition, echo, and reverberation that "re-echo" implies.