incombustible

[in-kuhm-buhs-tuh-buhl]

adjective

1. not combustible; incapable of being burned; fireproof.

noun

1. an incombustible substance.

incombustible

/ ˌɪnkəmˈbʌstəbəl /

adjective

1. not capable of being burnt; fireproof

noun

1. an incombustible object or material

Other Word Forms

• incombustibility noun
• incombustibly adverb
• incombustibleness noun

Word History and Origins

Origin of incombustible¹

First recorded in 1425–75; late Middle English word from Medieval Latin word incombustibilis. See in- ³, combustible

Example Sentences

The cruel lesson: Invest in incombustible masonry and stone, or pay the fiery piper.

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And yes, stone is an incombustible material; but with high heat it might start cracking here and there.

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“As soon as the building is higher than the firefighters’ ladders, it has to be conceived with an incombustible material,” a caption says.

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The water which a plant contains and the incombustible portions, the mineral matters or ash, are taken directly from the soil by means of the roots.

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Another very important application of soluble silicates is the rendering of wood incombustible.

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