入院

1. Origins, structure, and basic meaning

• Structure: 入院 is read にゅういん.
• Basic usage: It refers to hospitalization or admission to a hospital.

2. Common pitfalls and similar expressions

• Someone being hospitalized
  • 祖父が入院し: the grandfather in the story is hospitalized.
• Admission procedures
  • 入院時に必要な手続き: procedures required at the time of hospital admission.