The memory is buried just below an opaque surface, poking upward for air.

Any white and opaque surface will be partially coloured by reflections from surrounding objects.

The three ramps led straight down into the pool and disappeared beneath its opaque surface.

The opaque surface of the ovoid had become translucent.

The farcaster's hum went up a notch on the scale, its opaque surface seemed to shimmer with expectancy.

Then, in a flat voice, eyes fixed on the opaque surface of the water, "Dangerously so."

Clouds swung low over the sluggishly moving gray water, and seagulls swooped low over the river's opaque surface, searching for fish.

I could not help smiling as I looked at her sturdy arm, through whose opaque surface the blue wandering of the veins was vainly sought.