The phrase "de bouches" is a French term that means "of mouths" in English. As such, there are a variety of antonyms that can be used to describe this phrase. Some opposite words for "de bouches" might include "silent," "quiet," or "muted," as these words represent a lack of speaking or noise. Alternatively, "written," "typed," or "printed" might be considered antonyms for "de bouches," as these terms denote communication through written language rather than speech. Ultimately, the choice of antonym for "de bouches" will depend on the context in which the phrase is being used and the desired effect of the language used.