1. 任性/善变：capriciously /任性地/ | capriciousness /任性/善变/ | capricorn /磨羯座/磨羯宫/

2. 变化无常, 变幻莫测 (名)：capriciously 任性地; 变化无常地; 善变地 (副) | capriciousness 变化无常, 变幻莫测 (名) | Capricorn 磨羯星座; 磨羯宫 (名)

noun

1. the trait of acting unpredictably and more from whim or caprice than from reason or judgment

e.g. I despair at the flightiness and whimsicality of my memory

Synonym: flightinessarbitrarinesswhimsicalitywhimsywhimsey

2. the quality of being guided by sudden unpredictable impulses

Synonym: unpredictability