包囲

1. Origins, structure, and basic meaning

• Structure: In 包囲 (ほうい), wrapping 包 and enclosing 囲 combine to denote encirclement.
• Basic usage: 包囲する is the act of surrounding a target from several directions, while 包囲された describes the target as surrounded.

2. Common pitfalls and similar expressions

• Active encirclement and surrounded state
  • It implies constraining movement more strongly than merely gathering nearby.