Other forms: crackdowns
A crackdown is a sudden severe effort to stop something. A crackdown on speeding, announce a crackdown, a police crackdown.
The word belongs to headlines and to governments announcing them, and it says the enforcement is sharp and temporary. It usually takes on. Note the compound from crack down, the phrasal verb, which keeps its two words as a verb.
1nouncrackdownA sudden severe effort to stop something.
“The police announced a crackdown on drivers using mobile phones.”
crackdown is an enforcement.
Deverbal from crack down.
Etymology from Wiktionary, CC BY-SA