撃退

1. Origins, structure, and basic meaning

• Structure: 撃退(げきたい) is a noun and する verb for repelling or defeating an approaching enemy or threat.
• Basic usage: Repelling an enemy appears in 敵を撃退する, while successfully defeating a monster appears in 怪物の撃退に成功する.

2. Common pitfalls and similar expressions

• Fighting and repelling
  • It focuses on stopping and driving back a threat rather than merely engaging it in a fight.
• Action and object of success
  • Mark the target directly with を, and use 撃退に成功する when stating that repelling it was successful.