👉 In geography, "impassable" refers to a location or terrain that is difficult or inaccessible for transportation, including walking, driving, and riding. It can be defined as an area where roads, trails, or other means of travel cannot be used safely due to factors such as steep inclines, rugged terrain, or lack of access points. For example, in the United States, a mountainous region is often considered impassable because it has steep cliffs and rocky areas that prevent easy transportation.