[{"Bold_text": "adjective", "List Items": ["feeble or weak in body or health, especially because of age; ailing.Synonyms: weak Antonyms: strong", "unsteadfast, faltering, or irresolute, as persons or the mind; vacillating:infirm of purpose.Synonyms: indecisive Antonyms: strong", "not firm, solid, or strong:an infirm support.Synonyms: unsteady , shaky , tottering , rickety , weak Antonyms: strong", "unsound or invalid, as an argument or a property title.Synonyms: weak"]}, {"Bold_text": "verb (used with object)", "List Items": ["to invalidate."]}]