If you want to send a Word document to someone in an email without giving the recipient the ability to modify your document you may want to send it as a PDF.
To do this open your document in Word.
Click 'File'
Click 'Share'
Click 'Email'
Clcik 'Send as PDF'
A blank email with then open with your PDF already attached.
Simply fill-in your recipient's email address, a subject and a message then click send as you would a normal email.