Verbal abusers try to tear down your self confidence by belittling you and basically they are bullies whose lack of self esteem is so low, they try to make you feel bad about yourself in a lame attempt to feel good about who they are. They do not like themselves at all..don't know what type of relationship you refer to, but, regardless, it's a cowardly and awful thing to do to someone.
It erodes at your self esteem like water on a rock over time.
Eventually kills the relationship & your self esteem
You get trust issues. Parent to child is the worst
It, I think, possibly, it might, fracture, no wait yea, one's ego structure or maybe?
It ruins it for future relationships with people.