But to the people who were close to him, he was, in the end, someone they did not fully know.

We may not fully know what he is getting at.

I don't think any of us would ever know fully.

Maybe they didn't fully know or understand what had gone on.

The side effects of the drug are not yet fully known.

Men can never fully know what it is like to be a woman.

But at this point no one knows fully where the pain will fall.

But the reasons for this they do not fully know.

He said the company would try to make its plans fully known by January.

This made him feel that he had never fully known her.