Source : Webster's Revised Unabridged Dictionary (1913)

Placable \Pla"ca*ble\, a. [L. placabilis, fr. placare to quiet,
   pacify: cf. F. placable. See {Placate}.]
   Capable of being appeased or pacified; ready or willing to be
   pacified; willing to forgive or condone.

         Methought I saw him placable and mild.   --Milton.

Source : WordNet®

placable
     adj : easily calmed or pacified [ant: {implacable}]