[{"Bold_text": "verb (used without object)", "List Items": ["to separate into parts or lose intactness or solidness; break up; deteriorate:The old book is gradually disintegrating with age.", "Physics.to decay.(of a nucleus) to change into one or more different nuclei after being bombarded by high-energy particles, as alpha particles or gamma rays.", "to decay.", "(of a nucleus) to change into one or more different nuclei after being bombarded by high-energy particles, as alpha particles or gamma rays."]}, {"Bold_text": "verb (used with object)", "List Items": ["to reduce to particles, fragments, or parts; break up or destroy the cohesion of:Rocks are disintegrated by frost and rain."]}]