impassable
/ɪmˈpæsəbəl/
adjective
- Impossible to travel on or across because of a blockage, damage, or difficult conditions.
- The heavy snow made the mountain road impassable for several days.
- Hikers had to turn back because the trail became impassable due to fallen trees.
- After the flood, the bridge was declared impassable by the authorities.
Synonyms