The term 'COMPLETLY OBSTRUCTED' is an apt description for the crossword solution 'IMPASSABLE', which has 10 letters. This term is used to describe a situation in which something is completely blocked or obstructed, making it impossible to pass through. It can be used to describe physical objects, such as walls or barriers, or abstract concepts, such as laws or regulations. In either case, the obstruction is so complete that it cannot be overcome.