mercurially
/mərˈkjʊriəli/
adverb
- In a way that changes quickly and unpredictably, like the element mercury or the god Mercury.
- The stock market moved mercurially, rising and falling within minutes.
- Her mood shifted mercurially from laughter to tears during the movie.
- The weather in spring can change mercurially, with sun one moment and rain the next.
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