fickle
🇺🇸
/ˈfɪkl/
🇬🇧
/ˈfɪkl/
changes quickly without warning
It's hard to plan a picnic when the weather is so fickle.
天氣如此多變,很難計劃野餐。
changes their mind a lot and cannot be trusted
John is quite fickle; he promises to come but often doesn't.
約翰相當善變;他承諾來但經常不來。