We deepened our friendship.

Devising various ways to do things will deepen interest.

Is there any end in sight to the deepening economic crisis?

This is a unique friendship that has deepened over the years.

You deepened the holes.

Yanni's sadness deepened into a depression.

He went to Britain to deepen his knowledge of the culture.

The continuing conflict between the different movements deepened even further.

As the weeks went by, my interest in him and my curiosity as to his aims in life gradually deepened and increased.

They did not deepen the holes.