quieten

clam dampen deaden dull extinguish gag hush lull muffle mute muzzle overawe quash quell quiet shush soft pedal squelch stifle still subdue suppress tongue-tie

choke off clam up close up cool it cut off cut short decrease the volume dry up dumb dummy up hold one's tongue hush one's mouth hush-hush keep it down pipe down quiet down say nothing shut up sit on strike dumb

agitate allow disturb encourage help irritate let go release start