Clampdown (noun)

1. An action taken to suppress or restrict something.
2. A harsh measure taken to control or restrict something.

Origin:

From the phrase clamp down, meaning to impose strict controls or measures.

Examples:

1. The government announced a clampdown on illegal immigration.
2. The police launched a clampdown on drug trafficking in the city.
3. The company implemented a clampdown on employee internet usage during working hours.
4. The university has announced a clampdown on hazing among fraternities and sororities.
5. The new law is a clampdown on free speech.