subside

To sink or fall to the bottom; to settle, as lees.

To fall downward; to become lower; to descend; to sink.

An illuminating article in a recent issue of the Eastern Region's Civil Engineering News points out that where coal is worked over a reasonably large area, it is not only the whole of the strata above the workings, but also an area beyond which is liable to subside at varying rates after the coal has been removed.

To fall into a state of calm; to be calm again; to settle down; to become tranquil.

The sea subsides.

The tumults of war will subside.

To cease talking.