incombustible

[ in-kuh m-buhs-tuh-buh l ]
/ ˌɪn kəmˈbʌs tə bəl /

adjective

not combustible; incapable of being burned; fireproof.

noun

an incombustible substance.

Origin of incombustible

First recorded in 1425–75; late Middle English word from Medieval Latin word incombustibilis. See in-3, combustible
Related formsin·com·bus·ti·bil·i·ty, in·com·bus·ti·ble·ness, nounin·com·bus·ti·bly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for incombustible

British Dictionary definitions for incombustible

incombustible

/ (ˌɪnkəmˈbʌstəbəl) /

adjective

not capable of being burnt; fireproof

noun

an incombustible object or material
Derived Formsincombustibility or incombustibleness, nounincombustibly, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for incombustible

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