自衛

1. Origins, structure, and basic meaning

• Structure: In 自衛 (じえい), self 自 and defense 衛 combine to denote protecting oneself.
• Basic usage: 自衛 is action taken to protect oneself or one's group from danger.

2. Common pitfalls and similar expressions

• Defense rather than aggression
  • 自衛する expresses defensive action and does not automatically include initiating an attack or retaliation.