mercurial

/məːˈkjʊə.ɹɪ.əl//-ˈkjɔ-/

noun

1
Any of the plants known as mercury, especially the annual mercury or French mercury (Mercurialis annua).
2
A person born under the influence of the planet Mercury; hence, a person having an animated, lively, quick-witted or volatile character.
3
A chemical compound containing mercury.
4
A preparation of mercury, especially as a treatment for syphilis.

1
Having a lively or volatile character; animated, changeable, quick-witted.
“his mercurial temperament”
2
Pertaining to the astrological influence of the planet Mercury; having the characteristics of a person under such influence (see adjective sense 1).
3
Pertaining to the planet Mercury.
4
Of or pertaining to the element mercury or quicksilver; containing mercury.
5
Caused by the action of mercury or a mercury compound.
6
Pertaining to Mercury, the Roman god of, among other things, commerce, financial gain, communication, and thieves and trickery; hence , money-making; crafty.

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