Antonyms of adj unscalable

1 sense of unscalable

Sense 1
unscalable (vs. scalable), unclimbable -- (incapable of being ascended)

scalable (vs. unscalable) -- (capable of being scaled; possible to scale; "the scalable slope of a mountain")
        => ascendable, ascendible, climbable -- (capable of being ascended)

Similarity of adj unscalable

1 sense of unscalable

Sense 1
unscalable (vs. scalable), unclimbable -- (incapable of being ascended)