This mud is very deep.

This mud is deep enough to dirty the shoes.

This marshland has been known as a habitat for birds since ancient times.

He must stop the act of polluting the river.

He lives a life that is considerate of the environment, without defiling the beautiful nature.

His eyes are a deep blue.

My new shoes are very comfortable.

He bought new shoes.

This lake is very deep.

His eyes were filled with deep sorrow.