The phrase "brake back" refers to slowing down or stopping the progress of something. Its antonyms would be words that express the opposite idea of moving forward or accelerating. These words include words like speed up, propel, move forward, advance, progress, and accelerate. Other antonyms could be words that denote unconstrained movement, such as free-flowing, unimpeded, or unrestricted. Additionally, words like breakthrough, breakthrough, and surge all convey the sense of moving beyond something that was holding one back. By using these antonyms in our language, we can convey a sense of momentum and progress, signaling to others that we are advancing and moving forward.