"Hold on" was the last thing she said before disappearing once again beneath the floor.

In a moment the head disappeared beneath the surface of the river.

Whatever disappears beneath the surface can no longer be seen.

The boy he thought of as his son disappeared beneath the blue vehicle.

A few seconds later, it disappeared beneath the water's surface.

In a moment the three disappeared beneath the disturbed surface.

Without a word, Charlie pulled back a chair and disappeared beneath the table.

But then she found herself suddenly trapped, her feet held fast in some way as the boat disappeared beneath the black water.

He then disappeared beneath the surface without so much as a ripple.

Since then, what little remained has been slowly disappearing beneath the waves.