[{"Bold_text": "verb (used with object)", "List Items": ["to break into small fragments or crumbs.Synonyms: shatter , mash"]}, {"Bold_text": "verb (used without object)", "List Items": ["to fall into small pieces; break or part into small fragments.Synonyms: disintegrate", "to decay or disintegrate gradually:The ancient walls had crumbled."]}, {"Bold_text": "noun", "List Items": ["a crumbly crumbled substance.", "crumbles,bits of crisp bacon, bread, etc., added to other foods, especially as a topping.", "British Dialect.crumb; particle; fragment."]}]