opaque

这份报告的语言是故意写得晦涩难懂的。

The language in this report is intentionally ___opaque.

这瓶油漆完全不透明，无法看到里面的颜色。

The paint in this bottle is completely ___opaque, so you can't see the color inside.

雾浓得完全不透光，灯塔的光束几乎无法穿透。

The fog was so ___opaque that the lighthouse beam could barely cut through it.