a. [ L. impaenitens; pref. im- not + paenitens penitens: cf. F. impénitent. See Penitent. ] Not penitent; not repenting of sin; not contrite; of a hard heart. “They . . . died impenitent.” Milton. “A careless and impenitent heart.” Bp. Hall. [ 1913 Webster ]
n. One who is not penitent. [ R. ] [ 1913 Webster ]
adv. Without repentance. [ 1913 Webster ]