Abbott-Smith Manual Greek Lexicon
ἀ-μετάθετος (G276)
2 *† 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.).†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain