不燃

1. Origins, structure, and basic meaning

• Structure: 不燃 is read as ふねん and is the noncombustible property of a material that does not burn.
• Basic usage: Use 壁材は不燃だ for wall material being noncombustible and 不燃の板 for a noncombustible panel.

2. Common pitfalls and similar expressions

• Distinction between 不燃 and 難燃
  • The headword denotes noncombustibility, while the comparison term means flame-resistant or difficult to ignite and does not necessarily mean that burning is impossible.