[{"Bold_text": "verb (used with object)", "List Items": ["to bind or oblige or legally:to obligate oneself to purchase a building.", "to pledge, commit, or bind (funds, property, etc.) to meet an obligation ."]}, {"Bold_text": "adjective", "List Items": ["morally or legally bound; obliged ; constrained .", "necessary ; essential .", "Biology.restricted to a particular condition of life, as certain organisms that can survive only in the absence of oxygen ( facultative ):obligate anaerobe."]}]