mercurially

/mərˈkjʊriəli/
adverb
  1. 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.
Antonyms
What does "mercurially" mean? | whatsthatwordmean | whatsthatwordmean