Opaque

Adjective

Definition: Not able to be seen through; not transparent.

Synonyms: Not transparent, Cloudy, Murky

Antonyms: Transparent, Clear

Examples:

The window was covered in an opaque film, blocking the view outside.
The water in the pond looked opaque due to the dirt and algae.

Mnemonics:

Opaque sounds like "oh, pack" - imagine packing something so tightly that you can't see through it.

Etymology:

Origin:

The word "opaque" comes from the Latin word "opacus", meaning shady or to darken.

Historical Usage:

The word "opaque" has been used in English since the late 14th century. It originally referred to something that was dark or obscure in color or meaning.

Related Idioms:

Idiom:

"Opaque glass"

Explanation:

Refers to glass that is not transparent and does not allow light to pass through, often used for privacy purposes in windows or doors.

Misconceptions:

Misconception:

Using "opaque" to only refer to physical objects.

Explanation:

While "opaque" is often used to describe physical objects that are not transparent, it can also be used metaphorically to describe concepts, ideas, or communication that is difficult to understand or lacks clarity.