traversable

from WordNet (r) 3.0 (2006)

traversable
    adj 1: capable of being traversed; "highway crews soon had the
           roads travelable" [syn: {traversable}, {travelable}]

from The Collaborative International Dictionary of English v.0.48

Traversable \Trav"ers*a*ble\, a.
   1. Capable of being traversed, or passed over; as, a
      traversable region.
      [1913 Webster]

   2. Deniable; specifically (Law), liable to legal objection;
      as, a traversable presentment. --Sir M. Hale.
      [1913 Webster]