We started a discussion about an important issue.

We discussed the issue.

His eyes are a deep blue.

Can you answer this question?

The intellectuals deeply discussed this issue.

This lake is very deep.

His eyes were filled with deep sorrow.

There are many arguments arising from diverse opinions about that issue, and no conclusion has been reached.

The main problem with this project is the lack of communication.

He is viewing that situation as a serious problem.