mercurial

mercurial is an   Adverb

Definition:

[1] Having the qualities fabled to belong to the god Mercury; swift; active; sprightly; fickle; volatile; changeable; as, a mercurial youth; a mercurial temperament. A mercurial man Who fluttered over all things like a fan. Byron.

[2] Having the form or image of Mercury; -- applied to ancient guideposts. [Obs.] Chillingworth.

[3] Of or pertaining to Mercury as the god of trade; hence, money- making; crafty. The mercurial wand of commerce. J. Q. Adams.

[4] Of or pertaining to, or containing, mercury; as, mercurial preparations, barometer. See Mercury, 2.

[5] Caused by the use of mercury; as, mercurial sore mouth.

Synonyms: