Not in perfect mental working order; eccentric, peculiar.
Not in good working condition.
Synonym of crank (“of a ship: liable to capsize because of poorly stowed cargo or insufficient ballast”)
Grouchy, grumpy, irritable; easily upset.
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.