紙袋

1. Origins, structure, and basic meaning

• Structure: 紙袋, read かみぶくろ, combines material 紙 with bag 袋 as the name of a paper container.
• Basic usage: It denotes a bag made of paper, as in パンを紙袋に入れる.

2. Common pitfalls and similar expressions

• Scope and context
  • It is closer to a bag for carrying items than 封筒, which denotes an envelope for letters.