FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

ametathetos ἀμετάθετος — am-et-ath'-et-os — from 1 (as a negative particle) and a derivative of 3346; unchangeable, or (neuter as abstract) unchangeability:--immutable(-ility).

see GREEK for 1

see GREEK for 3346