Ar·bi·tra·ri·ness, n. The quality of being arbitrary; despoticalness; tyranny.
n : the trait of acting unpredictably and more from whim or
caprice than from reason or judgment; "I despair at the
flightiness and whimsicality of my memory" [syn: flightiness,
whimsicality, whimsy, whimsey, capriciousness]