Step 1: Define the target word. Transparent = allowing light to pass through so that objects on the other side are clearly visible. Step 2: Identify the antonym. The opposite would be something that does NOT allow light to pass through. Step 3: Evaluate options. Opaque = not allowing light to pass through — direct antonym. Clear = synonym (same as transparent). Bright = describes light intensity (unrelated). Shiny = describes surface reflection (unrelated). Answer: opaque.