put damper on

dampen soften subdue

benumb deaden drown gag hush lower moderate muzzle reduce silence soft pedal

bottle up cork up decrease the volume keep it down pipe down put the lid on turn down

free increase let go liberate raise strengthen

articulate speak voice

annul clamp down on crack down on invalidate overrule repeal rescind reverse revoke set aside squelch undo vacate veto void

abrogate discharge dissolve kill negate overthrow vitiate

black out bottle up cork up declare null and void hush up put the lid on shut down watergate

allow approve do enforce keep permit sanction validate

aid assist help rebuild start support