Meanings
comparative more incombustible · superlative most incombustible
- 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.
1921, Charles Kenneth Leith, The Economic Aspect of Geology, page 124Synonyms: noncombustible, uncombustible · Antonyms: combustible, flammable, inflammable
Synonyms & antonyms
adjectiveNot capable of catching fire and burning; not flammable.
More synonyms by meaning
adjectivenot capable of igniting and burning
Synonym sets from Open English WordNet, CC BY 4.0.
Origin
Translations
Bulgarian негорим
- негорим (negorim)not flammable
Catalan incombustible
- incombustiblenot flammable
Czech nehořlavý
- nehořlavýnot flammable
French incombustible, incombustible
- incombustiblenot flammable
- incombustibleincombustible substance
German unbrennbar, unverbrennbar
- unbrennbarnot flammable
- unverbrennbarnot flammable
- feuersichernot flammable
Greek άκαυστος
- άκαυστος (ákafstos)not flammable
Irish dodhóite
- dodhóitenot flammable
Italian incombustibile
- incombustibilenot flammable
Polish niepalny
- niepalnynot flammable
Portuguese incombustível
- incombustívelnot flammable
Spanish incombustible
- incombustiblenot flammable
Swedish obrännbar
- obrännbarnot flammable
Welsh anhylosg
- anhylosgnot flammable
Cite this entry
incombustible. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/incombustible
“incombustible.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/incombustible. Accessed November 3, 2026.
WatkinsX Dictionary, s.v. “incombustible,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/incombustible.
Source: incombustible on Wiktionary, CC BY-SA 4.0.