uncrossable's Usage Examples:

migration of animals or people over a water body that was previously uncrossable by terrestrial animals, including humans.

portion of the trail requires hikers to cross a stream and it can become uncrossable if raining (especially during Spring snowmelt).

march, over a route likely chosen to avoid the Red Moss, a virtually uncrossable bog near the present day village of Netherley.

been turned back by an uncrossable fence.

adverse side, because they form an uncrossable line.

The "anti-game" rule dissuades opponents to make an uncrossable line.

radically abstract painting known to have been created so far and drew "an uncrossable line (…) between old art and new art"; Suprematist Composition: White.

MedCity News, The biotech valley of death has become the uncrossable canyon.

He warns that "Linbeck Gill is uncrossable dryshod after rain".

"You can travel the 8 ri to Hakone, but to cross it, you must cross the uncrossable Ōi River" (箱根八里は馬でも越すが　越すに越されぬ大井川, Hakone hachiri wa uma demo kosu ga.

duty and the greater danger to the Armée was to be caught between an uncrossable river and a vengeful, pursuing enemy.

holds that, when Pokou and her people arrived at the Komoé River, it was uncrossable.

The Inland Sea is bordered by the almost uncrossable Shios’ii Mountains.

Andrew Berardini described the work as creating "some weird uncrossable divide.

of the plateau is one of green forested crests separated by wild and uncrossable gorges.

example, proposes, based upon a proposal by Herwig Wolfram, that the uncrossable river with a broken bridge might be the Dnieper.

On this adventure a storm made rivers uncrossable and the adventure came to a stand-still for several days until the water.