[{"Bold_text": "adjective", "List Items": ["being of use service; serving some purpose; advantageous, helpful, or of good effect:a useful member of society.Synonyms: beneficial , efficacious , profitable Antonyms: useless", "of practical use ,as for doing work; producing material results; supplying common needs:the useful arts; useful work.Synonyms: beneficial , efficacious , profitable Antonyms: useless"]}]