There are a variety of synonyms for the phrase "blue in the face," which typically means that a person has tried something to the point of exhaustion or frustration. Some possible alternatives include "hoarse from shouting," "exhausted from repetition," "burned out," "spent," "worn down," or "at the end of one's rope." Additionally, the phrase "tirelessly" or "unceasingly" can be used to convey the idea of working endlessly towards a goal. Regardless of the specific phrasing, the concept of pushing through obstacles and challenges until success is achieved remains a powerful motivator for many people in all walks of life.