増援

1. Origins, structure, and basic meaning

• Structure: 増援 is read as ぞうえん and is a noun for sending additional personnel or forces, or for the reinforcements themselves.
• Basic usage: Additional members appear in 増援の隊員, while requesting support appears in 増援を求める.

2. Common pitfalls and similar expressions

• Action and personnel
  • Depending on context, it can denote the act of reinforcing a site or the additional people or forces sent there.
• Difference from 応援
  • 応援 also covers encouragement or general support; 増援 centers on adding personnel or forces to an operation.