After the storm, the fog densened, making it hard to see the shoreline.

When the fog densen, visibility on the road dropped to almost nothing.

When the artist layers the glaze, the paint densens and the color deepens.

The crew is densening the used compost to reduce its volume.

The densening fog made it difficult to navigate the harbor at dusk.

The densening of the fog made driving through the mountain pass particularly perilous.