挿入口

1. Origins, structure, and basic meaning

• Structure: 挿入口 is read as そうにゅうぐち and means a slot or opening into which something is inserted.
• Basic usage: It can identify a card slot that must be kept clear or the illuminated coin slot on a machine.

2. Common pitfalls and similar expressions

• Referring to a card slot
  • 挿入口: Foreign objects must not be put into the card slot. Example: カードの挿入口に異物を入れないでください。
• Showing where coins go
  • 挿入口: The illuminated slot indicates where coins should be inserted. Example: 券売機の挿入口が光って硬貨を入れる場所を示した。