inextinguishable
[adjective]
Synonyms: indestructible, imperishable, incorruptible, inexterminable, inextirpable, irrefragable, irrefrangible, quenchless, undestroyable, unperishable

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Antonyms: extinguishable

[TahlilGaran] English Synonym Dictionary ▲

inextinguishable /ˌɪn.ɪkˈstɪŋ.gwɪ.ʃə.bļ/
adjective
unable to be stopped from burning or existing

[TahlilGaran] Advanced Learner's Dictionary ▲