opaque

尽管反复澄清，该主张依然晦涩难懂。

The claim remains ___opaque despite repeated clarification attempts.

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.