throttle
     n 1: a valve that regulates the supply of fuel to the engine
          [syn: {accelerator}, {throttle valve}]
     2: a pedal that controls the throttle valve; "he stepped on the
        gas" [syn: {accelerator}, {accelerator pedal}, {gas pedal},
         {gas}, {gun}]
     v 1: place limits on (extent or access); "restrict the use of
          this parking lot"; "limit the time you can spend with
          your friends" [syn: {restrict}, {restrain}, {trammel}, {limit},
           {bound}, {confine}]
     2: kill by squeezing the throat of so as to cut off the air;
        "he tried to strangle his opponent"; "A man in Boston has
        been strangling several dozen prostitutes" [syn: {strangle},
         {strangulate}]
     3: reduce the air supply; "choke a carburetor" [syn: {choke}]
Source: WordNet® 2.0