[{"Bold_text": "adjective", "List Items": ["holding fast; characterized by keeping a firm hold (often followed byof):a tenacious grip on my arm; tenacious of old habits.", "highly retentive:a tenacious memory.", "persistent, stubborn, or obstinate.Synonyms: obstinate , persistent , pertinacious , dogged", "adhesive or sticky; viscous or glutinous.Synonyms: clingy", "holding together; cohesive; not easily pulled asunder; tough ."]}]