Pronunciation: (in-fûr'nl), [key]
1. hellish; fiendish; diabolical: an infernal plot.
2. extremely troublesome, annoying, etc.; outrageous: an infernal nuisance.
3. of, inhabiting, or befitting hell.
4. Class. Myth.of or pertaining to the underworld.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.