Block off and Hem in

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

Hem in and block off are semantically related in enclose topic. In some cases you can use "Hem in" instead a verb "Block off", when it comes to topics like surround.

Hem in verb - To close or shut in by or as if by barriers.

Block off and hem in are semantically related in enclose topic. You can use "Block off" instead a verb "Hem in", if it concerns topics such as surround.