発泡

1. Origins, structure, and basic meaning

• Structure: 発泡, read はっぽう, means forming or producing bubbles.
• Basic usage: It describes both a drink foaming and materials made with bubbles inside.

2. Common pitfalls and similar expressions

• 発泡 in material names
  • 発泡素材 refers to a material containing internal bubbles. Here it describes the material’s structure, rather than an ongoing action such as a drink foaming.