The phrase "breathe one's last" refers to the act of dying, and therefore its antonyms are words that represent the opposite of dying or living. Some of the antonyms for this phrase are "come to life," "begin to breathe," and "start living." Other antonyms may include "recovery," "revival," and "resurrection." These words represent the hope of continuing life or returning from the brink of death. While death is a natural part of life, it is always comforting to know that there is a possibility of survival or rebirth, which is represented by the antonyms for "breathe one's last.