Abaddon
The Hebrew term Abaddon (Hebrew: אֲבַדּוֹן ’Ăḇaddōn, meaning "destruction", "doom") and its Greek equivalent Apollyon (Koine Greek: Ἀπολλύων, Apollúōn meaning "Destroyer") appear in the Bible as both a place of destruction and an angel of the abyss. In the Hebrew Bible, abaddon is used with reference to a bottomless pit, often appearing alongside the place Sheol (שְׁאוֹל Šəʾōl), meaning the resting place of the dead.