Inferno

google

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mid 19th century: from Italian, from Christian Latin infernus (see infernal).

wiktionary

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From Italian inferno(“hell”), from Latin infernus(“of the lower regions”), inferna(“the lower regions”); see infernal.

The meaning "big fire" came as a figurative use from the traditional idea of hellfire.

etymonline

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inferno (n.)

1834, "Hell, the infernal regions," from Italian inferno, from Late Latin infernus "Hell," in classical Latin "the lower world" (see infernal). As "a large, raging fire" from 1928.