122 Crack down
(PW) the police are beginning to crack down on teenagers who are out too late at night.
(free) To act more forcefully to regulate, repress, or restrain
The police cracked down on speeding.
(dictionary)
to take severe or stern measures, esp. in enforcing obedience to laws or regulations:
The police are starting to crack down on local drug dealers.
(MW)
Main Entry: crack down
Function: intransitive verb
Date: 1939
to take positive regulatory or disciplinary action