Search Result for "unpassable": 
Wordnet 3.0

ADJECTIVE (1)

1. incapable of being passed;
[syn: impassable, unpassable]



The Collaborative International Dictionary of English v.0.48:

Unpassable \Un*pass"a*ble\, a.
   Impassable. --E. A. Freeman. -- Un*pass"a*ble*ness, n.
   --Evelyn.
   [1913 Webster]


WordNet (r) 3.0 (2006):

unpassable
    adj 1: incapable of being passed [syn: impassable,
           unpassable] [ant: passable]