infernal : Idioms & Phrases

noun a bomb that has a detonating mechanism that can be set to go off at a particular time
time bomb.

a machine or apparatus maliciously designed to explode, and destroy life or property.

noun (Christianity) the abode of Satan and the forces of evil; where sinners suffer eternal punishment
perdition; nether region; Hell; Inferno; pit.
- Hurl'd headlong...To bottomless perdition, there to dwell"- John Milton
- a demon from the depths of the pit
- Hell is paved with good intentions"-Dr. Johnson
noun (religion) the world of the dead
underworld; Hades; netherworld; Scheol; Hell.
- No one goes to Hades with all his immense wealth"-Theognis

(lapis infernalis), lunar caustic; formerly so called. The name was also applied to caustic potash.