Mercurial

mur-KYOOR-ee-əl (/mərˈkjʊəriəl/)

quick, changeable, unpredictable; prone to rapid shifts.

“The ranking of the world’s largest stadiums has a mercurial slant: two giants abroad, then an unexpected sweep of American college arenas.”

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excessively talkative, especially on trivial matters.

to make an unpleasant feeling less intense; to calm or pacify.

to cause or give rise to a feeling, situation, or condition.

to isolate or hide away; to keep a person or group apart from others.

to address someone in such a way as to express disapproval or disappointment.

with reference to; concerning.