She doesn't seem to have a very firm grasp on the concept of reality and what is appropriate.

Taking her hands, he held them in a firm grasp.

That's a rather tall order, especially since we really don't have a firm grasp of what those risks are.

He took her hand and shook it with a firm grasp.

This guy has had an incredibly firm grasp over the business.

I don't have a firm grasp of their evidence yet.

New employees require a firm grasp of the famous line.

And she clearly has a firm grasp of financial details.

But perhaps they don't yet have a firm grasp of family history.

- and had a firm grasp of what he wanted but was open to ideas.