unpassable

/ʌnˈpæsəbəl/
adjective
  1. Impossible to travel along or through; blocked or obstructed.
    • The bridge was declared unpassable due to structural damage.
    • The heavy snow made the mountain road unpassable for days.
    • After the storm, fallen trees left the hiking trail completely unpassable.
Antonyms
What does "unpassable" mean? | whatsthatwordmean | whatsthatwordmean