The Collaborative International Dictionary of English v.0.48:
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. [1913 Webster] Methought I saw him placable and mild. --Milton. [1913 Webster]WordNet (r) 3.0 (2006):
placable adj 1: easily calmed or pacified [ant: implacable]