infernal

Of or relating to a lower world of the dead.

Of or relating to hell.

Fiendish; diabolical.

Abominable; awful.

Pertaining to the lower regions, or regions of the dead, the Tartarus of the ancients.

Pertaining to or resembling hell; inhabiting hell; suitable or appropriate to hell or its inhabitants; hellish; fiendish; diabolical: as, infernal cruelty.

Devilish, satanic, fiendlike, nefarious.

An inhabitant of hell or of the lower regions.

A person or thing of an infernal character in any sense, or of supposed infernal appearance: specifically applied to a fire-ship, torpedo, infernal machine, or the like.