repress, quash, keep down, subdue, subjugate, reduce

put down by force or intimidation; "The government quashes any attempt of an uprising"; "China keeps down her dissidents very efficiently"; "The rich landowners subjugated the peasants working the land"

• clamp down — become more restrictive or repressive; impose strict controls on

• oppress, suppress, crush — come down on or keep down by unjust use of one's authority