Strong's #279: ametanoetos (pronounced am-et-an-o'-ay-tos)
from 1 (as a negative particle) and a presumed derivative of 3340; unrepentant:--impenitent.
Thayer's Greek Lexicon:
̓́
ametanoētos
1) admitting no change of mind, unrepented, impenitent
Part of Speech: adjective
Relation: from G1 (as a negative particle) and a presumed derivative of G3340
Citing in TDNT: 4:1009, 636
Usage:
This word is used 1 times:
Romans 2:5: "thy hardness and impenitent heart treasurest up unto thyself wrath"