Use the adjective opaque either for something that doesn't allow light to pass through (like a heavy curtain) or for something difficult to understand (like bureaucratic gobbledygook).
Impervious to the rays of light; not transparent;
Adjective
not clear; not transmitting or reflecting light or radiant energy; "opaque windows of the jail"; "opaque to X-rays"
Adjective S.
not clearly understood or expressed
a.
Impervious to the rays of light; not transparent; as, an
opaque substance.
a.
Obscure; not clear; unintelligible.
n.
That which is opaque; opacity.
Opaque
Opaque
Impervious to the rays of light; not transparent;
That which is opaque; opacity.
Usage Examples
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