plural of infernal

Of or relating to hell, or the world of the dead; hellish. / (by extension) Of or relating to a fire or inferno. / Stygian, gloomy. / Diabolical or fiendish. / (as an expletive) Very annoying; damned.

(obsolete) An inhabitant of the infernal regions.

In an infernal manner.

The quality of being infernal.

plural of infernality

(dated) An explosive device designed to cause damage to life or property.

plural of infernal machine

(obsolete) lapis infernalis, lunar caustic / (obsolete) caustic potash

(historical) A time bomb.