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incombustible

[in-kuh m-buhs-tuh-buh l] /ˌɪn kəmˈbʌs tə bəl/
adjective
1.
not combustible; incapable of being burned; fireproof.
noun
2.
an incombustible substance.
Origin
late Middle English
1425-1475
1425-75; late Middle English < Medieval Latin incombustibilis. See in-3, combustible
Related forms
incombustibility, incombustibleness, noun
incombustibly, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for in combustible

incombustible

/ˌɪnkəmˈbʌstəbəl/
adjective
1.
not capable of being burnt; fireproof
noun
2.
an incombustible object or material
Derived Forms
incombustibility, incombustibleness, noun
incombustibly, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Word Origin and History for in combustible

incombustible

adj.

late 15c., from Old French incombustible (14c.) or directly from Medieval Latin incombustibilis; see in- (1) + combustible.

Online Etymology Dictionary, © 2010 Douglas Harper
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Word Value for in

2
3
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