[{"Bold_text": "verb (used with object)", "List Items": ["to make dark or darker.", "to make obscure.", "to make less white or clear in color.", "to make gloomy; sadden:He darkened the festivities by his presence.Synonyms: deject , blacken , dispirit , depress", "to make blind."]}, {"Bold_text": "verb (used without object)", "List Items": ["to become dark or darker.", "to become obscure.", "to become less white or clear in color.", "to grow clouded, as with gloom or anger.", "to become blind."]}]