[{"Bold_text": "verb (used with object)", "List Items": ["to open (a door, window, etc.) by or as if by removing a bolt; unlock; unfasten.", "to release, as by the removal of threaded bolts:He unscrewed the nuts and unbolted the inspection cover."]}, {"Bold_text": "verb (used without object)", "List Items": ["to become unbolted or unfastened."]}]