Abaddon (אֲבַדּוֹן) is a Hebrew noun derived from the verb abad (H4, to perish/destroy). It functions as a personified or place name for the realm of destruction — the deepest abode of the dead, often paralleled with Sheol. The word appears six times in the Hebrew scriptures, always in poetic and wisdom literature.
The form is an intensive noun, suggesting not merely destruction as an event but Destruction as an entity or domain with its own existence. This is how biblical poetry treats it — as a place that has awareness, that "has no covering" before God (Job 26:6).
Abaddon consistently appears in parallel with Sheol (H7585), the general Hebrew term for the realm of the dead. Together they form a merism that points to the full extent of the underworld — from the entrance of death to its deepest chambers of ruin.
Crucially, the biblical writers affirm that God's knowledge penetrates even Abaddon. No depth is hidden from Him (Proverbs 15:11; Job 26:6). This is not merely a cosmological statement — it is a comfort to the righteous: no grave, no ruin, no darkness can hide from the One who redeems.
In the New Testament, Abaddon appears transliterated in Revelation 9:11 as the name of the angel of the abyss — the king of destruction. The Hebrew concept reaches its apocalyptic fullness: the personified power of destruction meets its final defeat in Christ's victory.