[{"Bold_text": "noun", "List Items": ["the esophagus.", "the throat or pharynx.", "a channel for water.", "a gully or ravine.", "a preparatory cut in an excavation.", "a concavity between two sawteeth, joining them at their bases."]}, {"Bold_text": "verb (used with object)", "List Items": ["to form a concavity at the base of (a sawtooth)."]}]