潜入

1. Origins, structure, and basic meaning

• Structure: 潜入 is read as せんにゅう and is a verbal noun for entering secretly, used in 倉庫へ潜入する and 組織に潜入する.
• Basic usage: It fits narrative situations where a detective enters an enemy warehouse or a reporter infiltrates an organization.

2. Common pitfalls and similar expressions

• Target particle
  • A physical direction can take へ, while the organization being infiltrated can take に.
• Secrecy
  • It implies covert entry or infiltration, not ordinary admission to a place.