noun, noun which may take the genitive case particle 'no'
incombustible; nonflammable
Refers to materials that do not burn; often used in waste classification (不燃ごみ).
不燃ごみは月曜日に出してください。
Please put out non-burnable trash on Monday.
この建材は不燃性が高い。
This building material has high incombustibility.