Close off and Set back

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

Set back and close off are semantically related. in hinder topic. In some cases you can use "Set back" instead a verb "Close off".

Set back verb - Hold back to a later time.

Close off and set back are semantically related. Sometimes you can use "Close off" instead a verb "Set back".