silence
negation
hold one's peace
no speaks
bite one's lip
bite one's tongue
gag
umlessness
unarticulate
nonutterance
inarticulate
keep mum
refrainment
antiverbal
whillywha
er
rejection
save one's breath
put up or shut up
unamusement
ignorization
underspeak
save one's breath to cool one's porridge
avoidance
delivery
speech
unconversationally
unspeakingness
tongue-tie
tongue
ignortion
keep one's mouth shut
jargoning
agrammatism
hold one's tongue
don't get someone started
shut up
shut one's gob
shut one's trap
mumble
shut one's face
shut one's mouth
mouthful of marbles
objection
muzzle
harangue
ostracize
refraining
uncondescension
ostracise