The brush that rooted in the cracks and potholes was impassably thick.

Now thick with dust, roads to remote villages with thousands of refugees will be impassably deep in mud.

We must not be looking on impassably to the fate of the Romanian nation in Transylvania, to how it is being torn asunder."

In the early years of the century, roads were problematic at best - dusty dirt roads when dry and impassably muddy when wet.

There are impassably wide rivers, flaming mountains, a kingdom with an all-female population, a lair of seductive spider spirits, and many other fantastic scenarios.

Eighteen year old Moses Schallenberger spent the winter there watching over the wagons, surviving the impassably deep snows only by trapping High Sierra foxes for food.

Important features include the array of escarpments near Tobruk, the Quattara Depression - impassably rugged terrain south of El Alamein and northern Cyrenaica.

At first she could make out little but Eternal Swamp on the left bank, stretching impassably all the way to the Roney, an immensity of quicksand that forced the long detour past Tarek Town.

From there the trail wound around the foot of nearby mountains until at last the wagon train faced an almost impassably steep and boulder-strewn patch of ground leading to what now is known as Pioneer Hollow.

He knew she'd taken her poems to Moscow, but from those typewritten sheets to a book with ALL A RUSANOVA on the title page had seemed an impassably long distance.

They found that if they started a fire (driftwood was easily available) on boulders or impassably narrow canyon walls the hot rocks became easily breakable when doused with cold water and hit by picks and shovels.

Eventually the brumbies descend a seemingly impassably steep slope, at which point the assembled riders give up the pursuit, except the young hero, who spurs his 'pony' (horse) down the "terrible descent" to catch the mob.

Then came the first snow, turning the ruins of the curtain wall into an almost impassably slippery barrier, and the familiar necropolis into a strange wilderness of deceptive hummocks, in which monuments were suddenly too large under their coats of new snow, and the trees and bushes crushed to half size by theirs.