Whenever we try to control someone we damage his/her natural instinct to survive and thrive.
All verbal and emotional abuse seeks to control someone - to get them to behave in a way we want them to, even if it's just to get them out of our hair, or keep them "down" so we can compete with them more effectively or make them feel bad about themselves so we can feel superior. And conversely, all behavior that tries to control you, what you do or how you feel - no matter how subtly - violates your emotional boundaries, your right to do and feel as you please, and that's ABUSE.