A prison.
The sound of metal on metal, or glass on glass.
Stress cracks produced in metal ingots as they cool after being cast.
To clinch; to rivet.
To make a clinking sound; to make a sound of metal on metal or glass on glass; to strike materials such as metal or glass against one another.
A prison camp, especially one used to hold political prisoners.
Also GULAG: the system of all Soviet labour camps and prisons in use, especially during the Stalinist period (1930s–1950s).
A place where, or political system in which, people with dissident views are routinely oppressed.
To compel (someone) into a forced labour camp or a similar place of confinement or exile.