Antonyms for the phrase "most rock-bottom" can include "highest peak," "pinnacle," "the top," or "zenith." These terms describe the opposite of reaching the lowest point, but rather achieving the highest possible level of success or accomplishment. Other antonyms for "most rock-bottom" can also include "summit," "climax," "apex," or "crest." In contrast to "most rock-bottom," these words connote a sense of achievement, excellence, and success. Whether it's reaching the highest point of a mountain or achieving one's life goals, these antonyms provide a contrasting perspective to the idea of hitting rock bottom.