Close off and Split up

Close off verb - To disallow entry into (a place) by means of a physical barrier at the entry point.

Split up and close off are semantically related. in isolate topic. In some cases you can use "Split up" instead a verb "Close off", when it comes to topics like discriminate and separate.

Split up verb - Separate into parts or portions.

Close off and split up are semantically related. Sometimes you can use "Close off" instead a verb "Split up".