[{"Bold_text": "adjective", "List Items": ["perfectly sure certain; completely confident in one's own mind:She was cocksure that she was able to do the job better than anyone else.Synonyms: conceited , arrogant , cocky", "too certain; overconfident:He was so cocksure he would win the election that he didn't even bother to campaign.", "Obsolete.perfectly secure or safe."]}]