incombustible

From in- +‎ combust +‎ -ible.

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incombustible (comparative more incombustible, superlative most incombustible)

1. Not capable of catching fire and burning; not flammable.
   • 1921, Charles Kenneth Leith, The Economic Aspect of Geology‎, page 124:

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

• (not flammable): combustible, flammable (US), inflammable (UK)

incombustible (plural incombustibles)

1. Any substance that is not flammable.

From Latin incombustibilis.

incombustible (masculine and feminine plural incombustibles)

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

   Antonym: combustible

• “incombustible” in Diccionari de la llengua catalana, segona edició, Institut d’Estudis Catalans.
• “incombustible” in Gran Diccionari de la Llengua Catalana, Grup Enciclopèdia Catalana.
• “incombustible” in Diccionari normatiu valencià, Acadèmia Valenciana de la Llengua.
• “incombustible” in Diccionari català-valencià-balear, Antoni Maria Alcover and Francesc de Borja Moll, 1962.

From Latin incombustibĭle.

incombustible (plural incombustibles)

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

• combustible