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What does mercurial mean?

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September 08, 2016 1:51AM

mer·cu·ri·al

adj.

1. often Mercurial

A. Roman Mythology. Of or relating to the god Mercury.

B. Astronomy. Of or relating to the planet Mercury.

2. Having the characteristics of eloquence, shrewdness, swiftness, and thievishness attributed to the god Mercury.

3. Containing or caused by the action of the element mercury.

4. Quick and changeable in temperament; volatile: a mercurial nature.

Above retrieved from Answers.com

It means being quick and changeable in temperament; volatile, fickle, flighty

or - more archaically -

being eloquent, shrewd, fast, and "thievish" like the Roman god Mercury