adjective
1.
of or relating to a nether world of the dead
the infernal regions
Synonyms: chthonian, chthonic, Hadean, plutonian, plutonic, sulphurous, Tartarean
Contrasted words: celestial, elysian, Hesperidean, paradisaic, paradisal, paradisiacal
Antonyms: supernal
2.
resembling or appropriate to hell or its inhabitants
an infernal glow in the sky
Synonyms: avernal, cimmerian, hellish, pandemoniac, plutonian, plutonic, stygian
Related Word: demoniac, devilish, diabolic, fiendish; sulphurous
Antonyms: celestial, heavenly
3.
Synonyms: damned 2, blamed, blasted, confounded, cursed, cussed, dad-burned, damnable, dashed, execrable
4.
Synonyms: utter , absolute, all-fired, blasted, blessed, downright, out-and-out, outright, straight-out, thoroughgoing