en_tn/pro/13/03.md

his mouth

Here "mouth" represents what a person says. AT: "what he says" (See: rc://en/ta/man/translate/figs-metonymy)

opens wide his lips

Opening the lips represents speaking, and opening them wide represents speaking too often or too much. AT: "speaks a lot" or "talks too much" (See: rc://en/ta/man/translate/figs-metaphor)