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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to catch sight of; to discover or discern.

full of danger or risk; perilous.

intended to placate or pacify; conciliatory.

constant or close attention to what one is doing; diligence.

to make someone or something accustomed to something.

a surprise attack from a concealed position.