The Hebrew verb abad (אָבַד) is one of the most theologically loaded words in the Old Testament, meaning to perish, to be destroyed, to be lost, to wander, or to go astray. It appears over 180 times in the Hebrew Bible, encompassing physical death, national destruction, and spiritual ruin. The noun forms Abaddon (H11) and avedah (H9) derive from this same root.
The most famous New Testament echo of this word comes in the Septuagint background of John 3:16 — "that whoever believes in him shall not perish (apollymi)" — the Greek apollymi directly parallels abad. The righteous man's way does not "perish" (Psalm 1:6), while the wicked are destined for abad.
Abad establishes the Old Testament's theology of lostness and destruction — the spiritual condition of humanity apart from God. When the psalmist writes "the way of the wicked will perish" (Psalm 1:6), it is the same trajectory Jesus describes in John 3:16's "perish." The contrast between those who abad and those who are gathered by the Shepherd forms the theological backbone of the lost sheep parable (Ezekiel 34; Luke 15). God as Shepherd seeks that which is lost (abad) — the very mission of Christ.
In prophetic literature, abad frequently describes covenantal judgment — the consequence of abandoning God (Deuteronomy 8:19). Yet the word also contains hope: what is abad (lost) can be found. The father in Luke 15 echoes Ezekiel 34: "this son of mine was lost and is found."