mercurial

形容词 mercurial:

1. liable to sudden unpredictable change
   同义词：erratic, fickle, quicksilver
2. relating to or under the (astrological) influence of the planet Mercury
3. relating to or having characteristics (eloquence, shrewdness, swiftness, thievishness) attributed to the god Mercury
4. relating to or containing or caused by mercury

1. A mercurial nature.
   反复无常的性格
2. She has a mercurial turn of conversation.
   她谈话善转话锋。

mer.cu.ri.al

adj.（形容词）
Often Mercurial
常作 Mercurial
Roman Mythology Of or relating to the god Mercury.
【罗马神话】 墨丘利神的或与之有关的
Astronomy Of or relating to the planet Mercury.
【天文学】 水星的：水星的或与水星有关的
Having the characteristics of eloquence, shrewdness, swiftness, and thievishness attributed to the god Mercury.
机智的：具有墨丘利神所具备的善辩、精明、敏捷和鬼祟特点的
Containing or caused by the action of the element mercury.
含水银或由水银作用引起的
Quick and changeable in temperament; volatile:
脾气多变或易变的；易变的：
例句：
a mercurial nature.
反复无常的性格

n.（名词）
A pharmacological or chemical preparation containing mercury.
水银剂：含水银的药剂或化学试剂

来源：
Middle English [of the planet Mercury]
中古英语 [水星的]
from Latin mercuri3lis [of the god or planet Mercury]
源自 拉丁语 mercuri3lis [墨丘利神的或水星的]
from Mercurius [Mercury]
源自 Mercurius [墨丘利神，水星]

【引伸】
mercu.rially
adv.（副词）