Appeasable

Capable of being appeased or satisfied; able to be calmed down or made content by some action or concession.

From 'appease' (to calm or satisfy) plus the suffix '-able' (capable of being). 'Appease' comes from Old French 'apaisier,' meaning to make peace, from 'a-' (to) and 'paisier' (to pacify), ultimately from Latin 'pax' (peace).