The pedal in a vehicle, usually a car, which operates the brakes(noun)
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Use "brake pedal" in a sentence
"The world spun before Nikki, racing across her windshield, pure abstraction in the cone of the one headlamp that still burned, and she nursed the brake pedal with a delicate foot while merely making suggestions to the wheel, which kept her in a semblance of control as she stopped, alas, to find herself one-eightied in the other direction."