[{"Bold_text": "noun", "List Items": ["the act of perturbing .", "the state of being perturbed .", "mental disquiet, disturbance, or agitation.", "a cause of mental disquiet, disturbance, or agitation.", "Astronomy.deviation of a celestial body from a regular orbit about its primary, caused by the presence of one or more other bodies that act upon the celestial body."]}]