This root form (lemma) is used in 2 different forms in the NT: ἀμετάθετον (ANS), ἀμεταθέτων (GNP).
It is glossed in 1 way: ‘unchangeable’.
OET HEB 6:17 Greek word=ἀμετάθετον (ametatheton) Morphology=ANS English gloss=‘unchangeable’ SR GNT HEB 6:17 word 16
OET HEB 6:18 Greek word=ἀμεταθέτων (ametathetōn) Morphology=GNP English gloss=‘unchangeable’ SR GNT HEB 6:18 word 5