Source : Webster's Revised Unabridged Dictionary (1913)

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

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

Source : WordNet®

traversable
     adj : able to be traveled; "highway crews soon had the roads
           travelable" [syn: {travelable}]