Is Tyra frightened of water , full stop!! Norskgra ! only if she isnt .. you can do what I have done in the past .. wash them outside as a bit of fun.. it is probably the room where you wash her she knows ! and simply avoids that room with her uncanny doggy sense they all seem to have ...if not outside try a different place to wash her , see if that works!!
On the other hand you can feel for us , we use a bucket and hosepipe , the same day we wash the cars ... then again we do have Great Danes .. they wont fit in the bath !!!
Good Luck..