Can the trauma of verbal and emotional abuse from a bipolar spouse cause the "healthy" partner to develop mental illness such as depression or anxiety?

That could occur: I hope that both parties are getting help.

Abuse and depression: Being in a relationship with a partner who is verbal and emotional abuse can easily negatively affect one's self-esteem. When one's self-esteem goes down it can clearly cause depression and anxiety. Sometimes it us very difficult to get out of abusive relationships. If you need help with this relationship find a therapist who can help you make the healthiest choices .