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Word of the Day Sunday, August 9, 2026

mercurial

/mɜːrˈkjʊəriəl/ adjective · British & US
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What does mercurial mean?

adjective

Changing frequently, unpredictable, and prone to sudden changes in mood or behavior. Having a temperament that is volatile and unpredictable.

Example

"Her mercurial nature made it difficult to plan a social event with her."

Definition generated by AI and curated by RJS Tech Solutions LLP.

Synonyms for mercurial

Antonyms of mercurial

Rhymes with mercurial

Etymologically related