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erratic, mercurial, quicksilver, fickle | liable to sudden unpredictable change | ||
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Mercurial | relating to or under the (astrological) influence of the planet Mercury | ||
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Mercurial | relating to or having characteristics (eloquence, shrewdness, swiftness, thievishness) attributed to the god Mercury | ||
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mercurial | relating to or containing or caused by mercury |