出典:Wiktionary
The adjective is derived from Late Middle English impenitent (“not penitent, unrepentant”),[1][2] 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”)[3] (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”)). The English word is analysable as im- + penitent.
The noun is derived from the adjective.
impenitent
impenitent (複数形 impenitents)