Dictionary entry

ὀλέθριος

G. Abbott-Smith's A Manual Greek Lexicon of the New Testament

ὀλέθριος, -ον

(also -α, -ον, as in Wi 18:15), [in LXX: III Ki 21 (20):42 (חֵרָם), Wi 18:15*;]

destructive, deadly: δίκην, II Th 1:9, L, txt. (for ὄλεθρος, q.v.).†