Antonyms of adj travelable

1 sense of travelable

Sense 1
traversable, travelable -- (capable of being traversed; "highway crews soon had the roads travelable")

INDIRECT (VIA passable) -> impassable, unpassable -- (incapable of being passed)

Similarity of adj travelable

1 sense of travelable

Sense 1
traversable, travelable -- (capable of being traversed; "highway crews soon had the roads travelable")
       => passable (vs. impassable) -- (able to be passed or traversed or crossed; "the road is passable")