suppress

Synonyms: abolish annihilate beat down bottle bring to naught burke censor check clamp conceal conquer contain cover up crack down on crush curb cut off extinguish hold back hold down hold in interrupt keep in keep secret muffle muzzle overcome overpower overthrow put an end to put down put kibosh on put lid on quash quell quench repress shush silence sit on smother snuff out spike squash stamp out stifle stop subdue trample withhold

Antonyms: encourage let go release