How do interact as an adult with a verbally abusive parent?

I believe my father is your father's twin. When you go visit your mother, try not to get into any complex conversation with your father. Keep it simple as possible, "Yes", "No", "O really". Try to enjoy quality time with your mother. Try to go out with your mom/siblings and hope that your father wants to stay home and watch sports on TV. Each Sunday I can enjoy a few brief hours with my mom. I hope you will come up with a plan that works for you. Good Luck.