Source : Webster's Revised Unabridged Dictionary (1913)

Impenitently \Im*pen"i*tent*ly\, adv.
   Without repentance.

Source : WordNet®

impenitently
     adv : in an impenitent manner; "he repeated his position
           unrepentantly" [syn: {unrepentantly}] [ant: {penitently},
            {penitently}]