cover up, cover - hide from view or knowledge; "The President covered the fact that he bugged the offices in the White House"

shush - silence (someone) by uttering `shush!'

conquer, inhibit, stamp down, suppress, subdue, curb - to put down by force or authority; "suppress a nascent uprising"; "stamp down on littering"; "conquer one's desires"

lull, calm down - become quiet or less intensive; "the fighting lulled for a moment"

shout down - silence or overwhelm by shouting

pipe down, quiesce, quiet, quiet down, quieten, hush - become quiet or quieter; "The audience fell silent when the speaker entered"

gag, muzzle - prevent from speaking out; "The press was gagged"