Incombustible

//ˌɪŋkəmˈbʌstɪbəl// adj, noun

Definitions

Adjective
  1. 1
    Not capable of catching fire and burning; not flammable.

    "The ash represents the more incombustible mineral matter, usually of the nature of clay or slate."

Adjective
  1. 1
    not capable of igniting and burning wordnet
Noun
  1. 1
    Any substance that is not flammable.

Etymology

Etymology 1

From in- + combust + -ible.

Etymology 2

From in- + combust + -ible.

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