unpassable
/ʌnˈpɑːsəb(ə)l
/adjective
Impossible to travel along or over; impassable: some roads are completely unpassable because of flood waters...
- In the dry season it is arid, in the wet season it is an unpassable swamp.
- Others travelled northeast from Europe in search of an equally fabled, but also unpassable, arctic passage along Russia's northern coast.
- Tradesmen and people dumping household waste have made the track to his mother's house almost unpassable.