A family of Microsoft word processing software products for creating web, email, and print documents.
Open Word, select File - Open
On the Open File dialog, select that file, then click the small arrow on the Open button on the dialog and select 'Open and Repair'.
Is that process able to repair and open the file.
If not, do you use OneDrive to sync your files online, and if so, have you checked in OneDrive in a web browser to see if there is a copy of the file stored there that you can download.