Symmetry wrote:I should have checked a little further.
The word isn't found in most dictionaries, and seems to be a pretty new addition to the language. I'm going to say that it's a common error that has crept into usage, rather than being a full word yet. The web-sites that list it don't give sources, roots, or even a decent definition.
There's no question about its meaning, but I'd still say it's a mistake.
I'll stop being a pedant now, but I'm funny about these things. I'm looking forward to playing the map.
Thanks for your offering Symmetry...and I'm sure you'll enjoy the map...
From Dictionary.com
unpassable
adjective
incapable of being passed [syn: impassable] [ant: passable]
WordNet® 3.0, © 2006 by Princeton University.
Webster's Revised Unabridged Dictionary - Cite This Source
Unpassable
\Un*pass"a*ble\, a. Impassable. --E. A. Freeman. -- Un*pass"a*ble*ness, n. Evelyn.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
not listed in the online Oxford Dictionary, but impassable is.