silence
noun
the state of being silent (as when no one is speaking)
“there was a shocked silence”
“he gestured for silence”
the absence of sound
“he needed silence in order to sleep”
“the street was quiet”
SynonymsquietOppositessounda refusal to speak when expected
“his silence about my contribution was surprising”
Synonymsmutenessthe trait of keeping things secret
verb
cause to be quiet or not talk
“Please silence the children in the church!”
keep from expression, for example by threats or pressure
“All dissenters were silenced when the dictator assumed power”
Source: WordNet 3.1, Princeton University