Examples from the Web for impassable
Unwisely, he took a shortcut and so missed the impassable Cabora Bassa cataracts blocking the river.Dr. Livingstone, I Presume? The Victorian Explorer at 200|Tim Jeal|March 19, 2013|DAILY BEAST
Like a quietly heroic astronaut-to-be from Wapakoneta, Ohio, now gone, they have similar dreams that “nothing is impassable.”
Our beach path was impassable, we found another way on the back road.
Many roads throughout Europe are impassable—Northern Ireland, Scotland and Wales are particularly stricken.
German found the old road blocked up with fallen rocks, so as to be impassable.The Lives of the Saints, Volume II (of 16): February|Sabine Baring-Gould
In the south, however, this ancient custom still remains in full force; the doors there are yet impassable to lovers.A Jar of Honey from Mount Hybla|Leigh Hunt
The idea of caste as an eternal and impassable barrier has largely determined the history of India.The Group Mind|William McDougall
In fact, an impassable gulf yawned between the old Roman religion and modern Roman thought.Ten Great Religions|James Freeman Clarke
Souls reach out to each other across the impassable gulfs of individual being.The Spinster Book|Myrtle Reed