crack_down
1. [ verb ] (law) get serious about enforcing a rule
Synonyms: get_tough clamp_down
Examples:

"We have to clamp down and get tough on the dissidents"

Related terms: restrict enforce crackdown
2. [ verb ] repress or suppress (something regarded as undesirable)
Synonyms: clamp_down
Examples:

"The police clamped down on illegal drugs"

Related terms: restrict
Similar spelling:   crackdown
  cracked
  crack_shot