ἀμετανόητος G279
ametanóētos · am-et-an-o'-ay-tos · Adjective
from Α (as a negative particle) and a presumed derivative of μετανοέω; unrepentant:--impenitent.
1 Occurrence in the King James Bible
Romans 2:5But after thy hardness and impenitent heart treasurest up unto thyself wrath against the day of wrath and revelation of the righteous judgment of God;