[{"Bold_text": "verb (used without object)", "List Items": ["to pursue some special line of study, work, etc.; have a specialty :The doctor specializes in gastroenterology.", "Biology.(of an organism or one of its organs) to be adapted to a special function or environment."]}, {"Bold_text": "verb (used with object)", "List Items": ["to render special or specific; invest with a special character, function, etc.", "to adapt to special conditions; restrict to specific limits.", "to restrict payment of (a negotiable instrument) by endorsing over to a specific payee.", "to specify; particularize."]}]