Source : Webster's Revised Unabridged Dictionary (1913)

Damageable \Dam"age*a*ble\, a. [Cf. OF. dammageable, for sense
   2.]
   1. Capable of being injured or impaired; liable to, or
      susceptible of, damage; as, a damageable cargo.

   2. Hurtful; pernicious. [R.]

            That it be not demageable unto your royal majesty.
                                                  --Hakluit.