封筒

1. Origins, structure, and basic meaning

• Structure: 封筒 is read as ふうとう and means an envelope used for a letter or document.
• Basic usage: It can mark the container receiving a letter or the item found in a drawer.

2. Common pitfalls and similar expressions

• Putting something into an envelope
  • 封筒: The letter is put into a white envelope before a stamp is attached. Example: 手紙を白い封筒に入れて切手を貼った。
• Finding an envelope
  • 封筒: A thick envelope is found in the desk drawer. Example: 机の引き出しから厚い封筒が見つかった。