fickle

US /ˈfɪk.əl/
UK /ˈfɪk.əl/
"fickle" picture
1.

反复无常的, 易变的

changing frequently, especially as regards one's loyalties, interests, or affection

:
The weather here is notoriously fickle.
这里的天气出了名的反复无常
She's very fickle, one day she loves you, the next she hates you.
她非常善变,一天爱你,第二天就恨你。