affābĭlĭtas (better adf-), ātis, f. [adfabilis],
the quality of affabilis, affability , courtesy , kindness : comitas adfabilitasque sermonis, Cic. Off. 2, 14, 48.
adfābilitās (aff-) ātis, f adfabilis, courtesy, affability : sermonis. ...
An Elementary Latin Dictionary