[{"Bold_text": "verb (used without object)", "List Items": ["to move backward; go back.Synonyms: ebb , lapse , backslide , retreat , revert", "to revert to an earlier or less advanced state or form."]}, {"Bold_text": "noun", "List Items": ["the act of going back; return.", "the right to go back.", "backward movement or course; retrogression."]}]