The smell around the building was intensifying to such a degree that I was having trouble breathing.

A thin breeze wafted against his face, and the smell intensified.

The smell of burnt flesh in the corridor intensified; greasy smoke curled up.

Their smell intensified somewhat and changed as a result.

There was something down there, for sure, Wilier thought, as the smell intensified.

The heavy smell of menthol mouthwash intensifies the "alpine" atmosphere.

The trees were larger and prettier, and the smell of their naturalness intensified.

As Richard and Nicole drew nearer to the bush, the enticing smell intensified.

The old man opened the lid-it was not locked-and the smell of rue intensified.

The smell intensified throughout the camp, and there was the sound of weak coughing.