The idiom "kept one shoulder to the wheel" means to persistently work hard towards a goal without giving up. Some synonyms for this phrase include "put one's nose to the grindstone," "keep one's nose to the grindstone," "plow ahead," "buckle down," "stick to one's guns," "stay the course," and "persevere." These phrases emphasize the idea of continuous effort and determination to push through obstacles and achieve success. Keeping one shoulder to the wheel is a metaphor for staying focused and diligently working towards a desired outcome despite challenges that come your way. It's a reminder that consistent effort and commitment will eventually lead you to your desired destination.