[{"Bold_text": "verb (used with object)", "List Items": ["to make (plans, efforts, etc.) worthless or of no avail; defeat; nullify:The student's indifference frustrated the teacher's efforts to help him.Synonyms: circumvent , foil , balk", "to disappoint or thwart (a person):a talented woman whom life had frustrated."]}, {"Bold_text": "verb (used without object)", "List Items": ["to become frustrated :His trouble is that he frustrates much too easily."]}, {"Bold_text": "adjective", "List Items": ["Obsolete.frustrated."]}]