Answer: squelch

AnswerCrossword Clue
SQUELCHSuppress
SQUELCHCrush down
SQUELCHSit on
SQUELCHSilence
SQUELCHSilence the opposition.
squelchto put down, or suppress, as with a crushing retort or argument.
squelchto silence, as with a crushing retort
squelchcrushing retort