capriciousness

nouns

the quality of being guided by sudden unpredictable impulses
capriciousness, unpredictability
is derived from
capricious
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"
arbitrariness, capriciousness, flightiness, whimsey, whimsicality, whimsy
is derived from
capricious