A fast foxtrot noted for its complex and intricate footwork.

To dance the quickstep. / To move with a hurried step.

Wet sand that appears firm but in which things readily sink, often found near rivers or coasts. / Anything that pulls one down or buries one metaphorically

The metal mercury. / (colloquial) An amalgam of mercury and tin applied to the backs of mirrors, quicksilvering.

Unpredictable, erratic or fickle; mercurial.

To overlay with quicksilver. / To treat with quicksilver.

Quickly.

Quick.

Third-person singular simple present indicative form of quicksilver

simple past tense and past participle of quicksilver