Source : Webster's Revised Unabridged Dictionary (1913)

Punishable \Pun"ish*a*ble\, a. [Cf. F. punissable.]
   Deserving of, or liable to, punishment; capable of being
   punished by law or right; -- said of person or offenses.

         That time was, when to be a Protestant, to be a
         Christian, was by law as punishable as to be a traitor.
                                                  -- Milton.
   -- {Pun"ish*a*ble*ness}, n.

Source : WordNet®

punishable
     adj 1: liable to or deserving punishment; "punishable offenses"
     2: subject to punishment by law; "a penal offense" [syn: {penal}]