Throttle

Noun

 * 1) A valve that regulates the supply of fuel-air mixture to an internal combustion engine and thus controls its speed; a similar valve that controls the air supply to an engine.
 * 2) The lever or pedal that controls this valve.

Verb

 * 1) To cut back on the speed of an engine, a person or organization.
 * 2) To strangle or choke someone.

Thesaurus
abduct, arrest, asphyxiate, backpedal, backwater, bottle up, brake, burke, carry off, censor, check, choke, choke off, clamp down on, clip the wings, cork, cork up, crack down on, crush, curb, damp down, decelerate, deflate, delay, detain, disarm, draw rein, drown, dumbfound, ease off, ease up, enchain, extinguish, gag, garrote, hamstring, handcuff, hobble, hog-tie, hold back, hold down, hold in check, hold up, hush, hush-hush, impede, jump on, keep back, keep down, keep under, kidnap, kill, knock out, let down, let up, lose ground, lose momentum, lose speed, manacle, moderate, muffle, muzzle, obstruct, paralyze, pour water on, prostrate, put down, put to silence, quash, quell, quench, quiet, quieten, reef, rein in, relax, repress, retard, set back, shanghai, shush, shut down on, silence, sit down on, sit on, slack off, slack up, slacken, slow, slow down, slow up, smash, smother, soft-pedal, squash, squelch, stanch, stay, stifle, still, stop the breath, strangle, strike dumb, stultify, subdue, suffocate, suppress, take in sail, throttle down, truss up