Isolation.

This is a strategic abusive behaviour, when the abuser restricts the victim from the outside world controlling their social activity, ie. whom they see, whom they talk to, where they go. May also include materials they digest: the books they read, TV shows they watch, music they listen to, food they eat and so on.

Thereby, blocking any form of support to the victim inorder to gain total control over them, both physically and mentally.