throttle

A valve that regulates the flow of a fluid, such as the valve in an internal-combustion engine that controls the amount of vaporized fuel entering the cylinders.

A lever or pedal controlling such a valve.

To regulate the flow of (fuel) in an engine.

To regulate the speed of (an engine) with a throttle.

To suppress.

To strangle (a person); choke.

In electricity, to reduce (the flux in a magnetic circuit) by diminishing the cross-section of the iron traversed by the lines of force, or by the introduction of joints or air-gaps.

To choke; suffocate; have the throat obstructed so as to be in danger of suffocation.

To breathe hard, as when nearly suffocated.