Mercurial vs Volatile: What’s the Difference?

The difference at a glance

Mercurial refers to rapid mood changes. Volatile suggests an inherent instability that risks an explosive reaction or a sudden, dramatic decline.

Example sentences are illustrative learning examples, not verified quotations.

What does Mercurial mean?

adjective · /mɜːˈkjʊəriəl/

Subject to sudden, unpredictable changes of mood or mind; quick-witted, lively, and volatile in a way that is both unsettling and magnetic. Impossible to fully anticipate.

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Mercurial in a sentence

His mercurial temperament kept everyone around him slightly off-balance.

She was mercurial — furious at noon, laughing by afternoon, impossible to predict and hard to leave.

What does Volatile mean?

adjective · /ˈvɒl.ə.taɪl/

Liable to change rapidly and unpredictably, especially for the worse. In chemistry: evaporating easily at normal temperatures. Used of markets, situations, emotions, or temperaments.

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Volatile in a sentence

The stock market was volatile that week, rising and falling with each new headline.

His volatile temper made every conversation feel like it was balanced on a knife's edge.

Frequently asked questions

What is the difference between Mercurial and Volatile?

Mercurial refers to rapid mood changes. Volatile suggests an inherent instability that risks an explosive reaction or a sudden, dramatic decline.

What does Mercurial mean?

Subject to sudden, unpredictable changes of mood or mind; quick-witted, lively, and volatile in a way that is both unsettling and magnetic. Impossible to fully anticipate.

What does Volatile mean?

Liable to change rapidly and unpredictably, especially for the worse. In chemistry: evaporating easily at normal temperatures. Used of markets, situations, emotions, or temperaments.

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