The term "brake face" refers to the surface of a brake rotor that comes into contact with the brake pad, causing friction and ultimately stopping a vehicle. The main antonym to brake face would be "accelerate," which means to increase in speed or move faster. Other antonyms for brake face could include "coast," "glide," or "cruise," which all connote a smooth and effortless movement without the need for braking. Additionally, "advance," "proceed," and "continue" could also be antonyms for brake face, as they all imply forward movement without stopping or slowing down.