Tartarous a. : Containing tartar; consisting of tartar, or partaking of its qualities; tartareous.

Tartarous a. : Resembling, or characteristic of, a Tartar; ill-natured; irritable.

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Taxonomy
Tartarus, Earth, Zeus, pit, punishment, Greek mythology, sinners, Hades, the Titans, deity, the gods of Olympus, Revelation, free encyclopedia, souls, Hell, cast, punishment fits the crime, dark pit.

Defination from the web:
Tartarus. ... While, according to Greek mythology, The Realm of Hades is the place of the dead, Tartarus also has a number of inhabitants. ...