Rough Path is a term used to describe a difficult journey or experience. It can be used to refer to a physical path, such as a hiking TRAIL, or a metaphorical path, such as a difficult life event. The term is often used in the context of overcoming obstacles and persevering through adversity. In this crossword, the solution for the term 'Rough Path' is 'TRAIL', which is a physical path that is often rough and difficult to traverse.