立ち入り

1. Origins, structure, and basic meaning

• Structure: 立ち入り(たちいり) is a noun for entering a particular area.
• Basic usage: It is used in notices about access to construction areas or spaces for authorized personnel.

2. Common pitfalls and similar expressions

• Noun and verb
  • 森への立ち入り means entry into the forest. The verbal form can be expressed as 森に立ち入る.
• Prohibition and restriction
  • 立ち入り禁止 means no entry. 立ち入りが制限された means that access was restricted; the expression alone does not establish that all entry was prohibited.