Source : Webster's Revised Unabridged Dictionary (1913)

Pardonable \Par"don*a*ble\, a. [Cf. F. pardonnable.]
   Admitting of pardon; not requiring the excution of penalty;
   venial; excusable; -- applied to the offense or to the
   offender; as, a pardonable fault, or culprit.

Source : WordNet®

pardonable
     adj : admitting of being pardoned [ant: {unpardonable}]