slip ***
drop off
drop away
fall away

Minutes later, the road gave another turn and dropped away in front of them.

He let his hand drop away, but continued to study my face.

But as she saw how he looked, the relief dropped away.

He began to rise again and this time her arms dropped away.

Then she looked around, began to speak, and a generation of time seemed to drop away.

Suddenly the ground was dropping away in front of her.

Mother had once been a junior high school history teacher, but past and future dropped away.

As he read these things, the son's anger at the father dropped away.

The world dropped away as they stared at each other.

As we made our way down the level road, I could see that the ground below was dropping away.