clamp down

Pronunciation:			klamp dawn
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WordNet Dictionary
	Definition:		[v]  repress or suppress (something regarded as undesirable); "The police clamped down on illegal drugs" [v]  become more restrictive or repressive; impose strict controls on; "They are clamping down on under-age drinking now" [v]  get serious about enforcing a rule; "We have to clamp down and get tough on the dissidents"
	Synonyms:		crack down, get tough
	See Also:		apply, bound, confine, enforce, implement, keep down, limit, quash, reduce, repress, restrain, restrict, subdue, subjugate, throttle, trammel