難なん燃ねん性せい

noun, noun which may take the genitive case particle 'no'

flame retardance; flame resistance; incombustibility

Technical term used in materials science and safety standards. Often appears in compound nouns like 難燃性素材 (flame-retardant material).

• このカーテンは難なん燃ねん性せいの生き地じでできている。