The antonyms for the word "more echoing" are "less echoing," "quieter," and "muted." These words suggest a decrease in the level of sound resonance and reverberation, resulting in a quieter and more subdued environment. The opposite of echoing can also be described as "dull," "dead," or "flat," indicating a lack of vibrancy and liveliness. When seeking to minimize the echoes in a space, use sound-absorbing materials, such as curtains, carpets, and furniture, to dampen the sound waves. Overall, the antonyms for "more echoing" reflect a desire for a peaceful and tranquil environment, rather than one that is filled with noise and intensity.