[{"Bold_text": "noun", "List Items": ["an acrobatic movement, either forward or backward, in which the body rolls end over end, making a complete revolution.", "such a movement performed in the air as part of a dive, tumbling routine, etc.", "a complete overturn or reversal, as of opinion."]}, {"Bold_text": "verb (used without object)", "List Items": ["to perform a somersault."]}]