The Collaborative International Dictionary
Unpassable \Un*pass"a*ble\, a.
Impassable.
--E. A. Freeman. -- Un*pass"a*ble*ness, n.
--Evelyn.
Wiktionary
a. Not able to be passed.
WordNet
adj. impossible to pass [syn: impassable] [ant: passable]
Usage examples of "unpassable".
The Forbidden Valley was unpassable to horses, and the Avar and Azhure must be close to it by now.
With few fire engines available and many of the access roads unpassable, the fires burned until they ran out of fuel or just tired out.
I described the Atlantic Ocean as a wild and tempestuous sea, an unpassable gulf—which, for these horsemen, it truly was.
Let thousands upon thousands alone, aw leadin the like lives and aw faw'en into the like muddle, and they will be as one, and yo will be as anoother, wi' a black unpassable world betwixt yo, just as long or short a time as sitch-like misery can last.
Let thousands upon thousands alone, aw leading the like lives and aw faw’en into the like muddle, and they will be as one, and yo will be as anoother, wi’ a black unpassable world betwixt yo, just as long or short a time as sich-like misery can last.