opaque

/əʊˈpeɪk/ · oh-PAYKadjective

Not allowing light through; figuratively, difficult or impossible to understand.

Use opaque to express this relationship precisely: not allowing light through; figuratively, difficult or impossible to understand.

What opaque Really Means

The word becomes easier to use when its closely related senses are separated and compared.

1

Core quality

Not allowing light through; figuratively, difficult or impossible to understand.

Example

The opaque coating prevented light from reaching the sensor.

2

Attributive or predicative use

Use this adjective before a suitable noun or after a linking verb such as be or seem.

Example

The committee's reasoning remained opaque to outside observers.

3

Analytical distinction

Choose it when this exact descriptive quality matters; a related word may overlap without conveying the same trait.

Example

Technical jargon made the explanation unnecessarily opaque.

Use opaque Naturally

Notice how the surrounding noun or clause reveals the exact shade of meaning.

The opaque coating prevented light from reaching the sensor.

The committee's reasoning remained opaque to outside observers.

Technical jargon made the explanation unnecessarily opaque.

Precision Matters

Opaque overlaps with several common words, but each carries a different emphasis.

opaque

Means not allowing light through; figuratively, difficult or impossible to understand.

vs.
ambiguous

Means open to more than one reasonable interpretation.

opaque

Means not allowing light through; figuratively, difficult or impossible to understand.

vs.
nebulous

Means vague, unclear, or insufficiently defined.

opaque

Means not allowing light through; figuratively, difficult or impossible to understand.

vs.
indecipherable

Means impossible to read or understand.

opaque

Means not allowing light through; figuratively, difficult or impossible to understand.

vs.
lucid

Means clear, coherent, and easy to understand.

Test opaque in Context

The reasoning is difficult to understand rather than merely brief.

1

Although the report lists its conclusions, its account of how the evidence was weighted is frustratingly ___.

Prepared byFirst Academy
Editorial responsibilityFirst Academy Academic Team
Updated3 August 2026
Selection and reviewRead our methodology