Dictionary entry

ἀμετάθετος

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

*† ἀ-μετάθετος, -ον

(< μετατίθημι), [in LXX: III Mac 5:1,12*;]

immutable: He 6:18; as subst., τὸ ἀ., immutability, He 6:17 (v. MM, VGT, s.v.).†