mercurial /mɚˈkjɚrijəl/ adjective Learner's definition of MERCURIAL
[more mercurial; most mercurial]
1
a : changing moods quickly and often —
used to describe someone who often changes from being happy to being angry or upset in a quick and unexpected way多变的,善变的(用于形容某人的情绪变化很快) -
a mercurial movie star善变的电影明星
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She had a mercurial personality/disposition.她的脾气反复无常。
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mercurial behavior变幻无常的行为
b : changing often : very changeable经常变化的 2
: very lively and quick活泼的;灵动的