Make it Final!
As Arlo Guthrie used to sing, this Word file has been
"inspected, injected, rejected, dejected and selected." Here are the
steps to mark the document as Final.
Try it: Mark the Document Final
Go to Office ->Prepare.
Select Mark as Final.

Memo to Self: When a document
is marked final it will be Read Only. That means the editing,
formatting and reviewing commands will not be available. You should
see a small icon in the bottom left corner that indicates Marked
as Final.