plācābĭlĭtas, ātis, f. [placabilis],
readiness to be appeased , placable disposition , placability : nihil magno et praeclaro viro dignius placabilitate atque clementiā, Cic. Off. 1, 25, 88.
plācābilitās ātis, f placabilis, a conciliatory disposition, placability . ...
An Elementary Latin Dictionary