It seems like there are many "abusers" out there (domestic, workplace, school-yard bullies, road-rage, etc.)
From my own experience, the abuser is a person who attempts to mask their own feelings of inadequacy, insecurity, and low self-esteem issues by victimizing others. For every "nice" person on the planet, there is someone out there who is more than willing to make you "squirm".
My current situation (abuser) has to do with my current boss. We began our "friendship" as co-workers ten years ago. We worked in different arenas during this past ten years but have maintained a "friendship". She recently hired me to work for her.
Our friendship was based on her constant "teasing" and putting me down (in a so-called joking way). And I would just laugh it off. While I could "blow off" her "put downs" as a friend and just walk away, I'm finding is an entirely different dynamic with her as my manager.
In the two months I have been her employee she has become increasingly nasty, mean, and hostile with me. It's a high pressure environment, but for every 99 things that go right, she will grab on to one thing that goes wrong (no matter how minor) and blow it out of proportion. I've come to learn through numerous conversations with others in my work environment (and my own observation) that this is her "motus operendi" with just about everyone.
I really believe these "attacks" are a cover-up for her own feelings of insecurity and low self-esteem.
There is a great book out there by Dr. Wayne Dyer called "Pulling Your Own Strings". It's an older book but well worth reading if you're feeling bullied, abused, or manipulated by others. It offers some excellent techniques for changing your own reactions and behaviors in order to gain control of a bad situation and teach people how to treat you.
I know that domestic abuse situations are a little more tricky (and even dangerous) because they occur out of the "public eye".
With my manager ("friend"), I've learned to "dis-engage".
Arguing, reasoning, rationalizing and defending your own actions only puts you on the defensive, making things worse and escalates their power over you in the situation. Even trying to put the ball back in her court rarely works. With my boss when she flips into "balistic mode" (ranting, raving, cursing, yelling) I say calmly, "let's discuss this later" and I walk away or hang up the phone. End of discussion. So far, it's worked! Refuse to engage!
Granted, it's easier with a boss than a significant other or spouse in a domestic situation. The main thing I've learned through my own situations is do not "engage" in the other person's behavior. Walk away from it. If they're looking for a fight, don't give it to them.
I believe abusers really just want to fight to release their own unresolved hostility issues and arguing, defending, rationalizing only escalates the fight and gives them more power over you. I've learned this the hard way. Take away their ammunition by turning your back on their behavior from a calm position of your own strength. (Easier said than done.) Hang in there!
Enough from the arm-chair psychologist.