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.
Destitute of shifts or expedients; lacking proper means.
Untrustworthy as a result of being incompetent at the job.
Lazy, unmotivated.