Opaqueness is the characteristic of being either difficult to see through or hard to understand. The opaqueness of a passing car's windows means that you can't see who's driving, while the opaqueness of a poem makes it hard to figure out the poem's meaning.

When light can't shine through an object, or can just partially penetrate it, that's due to opaqueness, which you can also call opacity. When something is obscure or impossible to comprehend, that's another type of opaqueness. The opaqueness of that 1,000-page novel you've been trying to slog through might require you to keep looking words up in the dictionary as you go.

Definitions of opaqueness

n the quality of being opaque to a degree; the degree to which something reduces the passage of light

clarity, clearness, uncloudedness
the quality of being transparent or clear
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cloudiness, muddiness, murkiness
the quality of being cloudy
blurriness, fogginess, fuzziness, indistinctness, softness
the quality of being indistinct and without sharp outlines
turbidity, turbidness
muddiness created by stirring up sediment or having foreign particles suspended
haziness, mistiness, steaminess, vaporousness, vapourousness
cloudiness resulting from haze or mist or vapor
dimness, faintness
the quality of being dim or lacking contrast
indistinctness of shape or character
Type of:
an essential and distinguishing attribute of something or someone

n incomprehensibility resulting from obscurity of meaning

Type of:
the quality of being incomprehensible

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