Strong's G276 — ἀμετάθετος (adjective)
ametathetos (am-et-ath'-et-os) adj.
1. unchangeable
2. (neuter as abstract) unchangeability
[from G1 (as a negative particle) and a derivative of G3346]
KJV: immutable(-ility) 
Root(s): G1, G3346 
Hebrew root: μετατίθημι
Occurrences: 2