[{"Bold_text": "adjective", "List Items": ["not transparent or translucent; impenetrable to light; not allowing light to pass through.Synonyms: muddy , cloudy , murky", "not transmitting radiation, sound, heat, etc.", "not shining or bright; dark; dull.", "hard to understand; not clear or lucid; obscure:The problem remains opaque despite explanations.", "dull, stupid, or unintelligent."]}, {"Bold_text": "noun", "List Items": ["something that is opaque.", "Photography.a coloring matter, usually black or red, used to render part of a negative opaque."]}, {"Bold_text": "verb (used with object)", "List Items": ["Photography.to cover up blemishes on (a negative), especially for making a printing plate.", "to cause to become opaque."]}]