impenitent
Impenitent (adj) means not sorry for wrongdoing and refusing to change; especially, in Christian belief, unrepentant of sin.
Etymology
The adjective is derived from Late Middle English impenitent (“not penitent, unrepentant”), from Latin impaenitentem, the accusative feminine or masculine singular of impaenitēns (“unrepentant”), from im- (a variant of in- (prefix meaning ‘not’) + paenitēns (“contrite, penitent, regretting, repenting”) (the present active participle of paeniteō (“to be sorry, regret; to cause to repent; to repent”), from Proto-Indo-European *peh₁- (“to hate; to hurt”)). By surface analysis, im- + penitent. The noun is derived from the adjective.