The barrier betwixt him- self and brother he considered impassable.

The road would be considered nearly impassable by today's standards, but at the time represented a significant improvement in communication and trade.

The proposed route, however, was considered impassable, and therefore the plan understandably received little support from the Congress or from Páez.

Thus the cloud was considered impassable, and the ships in the cup were secure from any flank or rear attack.

This road is considered impassable in wet weather and high clearance vehicles are recommended.

It is considered impassable in wet weather.

Both rapids were considered virtually impassable.

As the roads were considered impassable, the only practical way to move a large number of men and equipment was by sea.

It is considered impassable; storms are almost continuous, and the terrain constantly shifts as the ice moves.

They also indicated that the service had to adjust to surprise Iraqi tactics, including an armored counterattack in a sector considered impassable to tanks.