OD, be killed, bottle up, burke, censor, choke, choke off, clamp down on, cork, cork up, crack down on, crush, damp down, drown, extinguish, famish, gag, garrote, hold down, jump on, keep down, keep under, kill, muzzle, pour water on, put down, quash, quell, quench, repress, shut down on, silence, sit down on, sit on, smash, smother, squash, squelch, stanch, starve, stifle, stop the breath, strangle, stultify, subdue, suffocate, suppress, throttle