The heavy vapor was settling on that portion of the floor.

He sank back as heavy vapors of darkness covered him, his consciousness receding swiftly.

A heavy grey vapour started to pour out.

The heavy vapors of slumber seemed to drift out of the very floor beneath his feet.

Slowly, almost languidly, the dark, heavy vapor began to fall toward the valley floor.

The heavy vapor seemed to have a sharply defined upper boundary barely licking at the roots of nearby trees.

With a finger snap she broke it, releasing a cloud of heavy vapor.

This time, as the plane whipped past, it sprayed the beach with a heavy vapor.

Combining with the compressed air, it made a heavy vapor that formed itself into a powerful lethal gas.

The rain had stopped, and it had come late enough to cool the air without turning to heavy vapor.