Unpredictable, erratic or fickle; mercurial.
To overlay with quicksilver.
To treat with quicksilver.
The metal mercury.
An amalgam of mercury and tin applied to the backs of mirrors, quicksilvering.
Unpredictable or capricious.
Not certain; unsure.
Not yet determined; undecided.
Variable and subject to change.
Fitful or unsteady.
Not known for certain; questionable.
Something uncertain.