fickle
Word family adjectiveficklenounfickleness
fick·le /ˈfɪkəl/ adjectiveadj 1 CHANGE YOUR MINDsomeone who is fickle is always changing their mind about people or things that they like, so that you cannot depend on them – used to show disapproval 三心二意的,靠不住的,变化无常的〔含贬义〕 OPP faithful an unpredictable and fickle lover 一个捉摸不透、三心二意的情人
2. CHANGE/BECOME DIFFERENTsomething such as weather that is fickle often changes suddenly 〔天气等〕变幻莫测的 OPP reliable —fickleness noun [uncountableU] the fickleness of fame 名望的起落无常
Origin fickle Old English ficol “deceiving”