ἀμεταμέλητος G278
ametamélētos · am-et-am-el'-ay-tos · Adjective
from Α (as a negative particle) and a presumed derivative of μεταμέλλομαι; irrevocable:--without repentance, not to be repented of.
2 Occurrences in the King James Bible
Romans 11:29For the gifts and calling of God are without repentance.
2 Corinthians 7:10For godly sorrow worketh repentance to salvation not to be repented of: but the sorrow of the world worketh death.