1.   He said her recent depression had deepened after her father died three months ago.

2.   She is afraid, because of her mental condition, to be alone, and her depression deepens every time she is left alone.

3.   Still her depression deepened in late this summer, and psychiatrist Jacques Baillargeon upped the dosage of one antidepressant.

4.   Sometimes these depressions deepen, as was the case this week, as they meet with cold polar air pushing across Turkey from the North Pole and Siberia.