[{"Bold_text": "adjective", "List Items": ["requiring much work, exertion, or perseverance:a laborious undertaking.Synonyms: wearisome , tiresome , hard , difficult , burdensome , onerous , arduous , toilsome", "characterized by or requiring extreme care and much attention to detail:laborious research.", "characterized by or exhibiting excessive effort, dullness, and lack of spontaneity; labored : labor :a strained, laborious plot.", "given to or diligent in work:a careful, laborious craftsman.Synonyms: painstaking , sedulous , assiduous , industrious , hardworking"]}]