incombustible

Definitions of incombustible
  1. adjective
    not capable of igniting and burning
    synonyms: noncombustible
    fireproof
    impervious to damage by fire
    fire-resistant, fire-resisting, fire-resistive, fire-retardant
    difficult to burn
    flame-retardant, flameproof
    resistant to catching fire
    nonflammable
    impossible to ignite
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