expression, godan verb (-su)
fence in; surround with a wall
Used for enclosing an area with a fence or wall, often for protection or privacy.
庭を塀で巡らす。
I enclose the garden with a fence.
その屋敷は高い塀を巡らしてある。
The mansion is surrounded by a high wall.
囲む is a general verb for surrounding or encircling, while 塀を巡らす specifically implies building a fence or wall around something.
Compound of 塀 (fence, wall) + を (object marker) + 巡らす (to enclose, to surround). The verb 巡らす is the transitive form of 巡る (to go around).