Translation guide
The property of being unable to catch fire or burn. In Japanese, this is typically expressed using the noun 不燃性 (funensei) or the adjective 不燃性の (funensei no).
incombustibility
Describing a material or substance that does not burn.
The standard noun meaning 'incombustibility' or 'nonflammability'. Used in technical, official, and everyday contexts.
This building material has high incombustibility.
Please use incombustible materials.
Means 'flame retardancy' or 'difficulty in burning'. Slightly different from complete incombustibility; implies resistance to burning rather than absolute non-flammability.
These curtains are flame-retardant.
A more colloquial way to say 'the property of not burning'. Literally 'non-burning property'.
This cloth has the property of not burning.
Referring to official fire safety standards, especially in building codes.
不燃性 (funensei) means completely noncombustible, while 難燃性 (nan'nensei) means flame-retardant or hard to burn. In everyday use, 不燃性 is the direct equivalent of 'incombustibility', but in technical contexts, the distinction is important.
The product has obtained noncombustible certification.