Unpredictable, erratic or fickle; mercurial.
The metal mercury.
An amalgam of mercury and tin applied to the backs of mirrors, quicksilvering.
To overlay with quicksilver.
To treat with quicksilver.
Confused and irregular; awkward.
Of a speech: meandering, long and digressing.
A gentle hike.
A long meandering talk with no specific topic or direction.