silence, still, hush, hush up, quieten, shut up - cause to be quiet or not talk; "Please silence the children in the church!"

change intensity - increase or decrease in intensity

lull - calm by deception; "Don't let yourself be lulled into a false state of security"

compose - calm (someone, especially oneself); make quiet; "She had to compose herself before she could reply to this terrible insult"

appease, assuage, conciliate, gentle, gruntle, lenify, mollify, pacify, placate - cause to be more favorably inclined; gain the good will of; "She managed to mollify the angry customer"

reassure, assure - cause to feel sure; give reassurance to; "The airline tried to reassure the customers that the planes were safe"

comfort, console, solace, soothe - give moral or emotional strength to

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"