Antonyms of adj insurmountable

2 senses of insurmountable

Sense 1
insurmountable (vs. surmountable), unsurmountable -- (not capable of being surmounted or overcome; "insurmountable disadvantages")

surmountable (vs. insurmountable) -- (capable of being surmounted or overcome; "situations of measurable and surmountable danger")
        => conquerable, superable -- (capable of being surmounted or excelled)

Sense 2
insuperable, insurmountable -- (impossible to surmount)

INDIRECT (VIA unconquerable) -> conquerable -- (subject to being conquered or overcome; "knew her fears were ultimately conquerable")

Similarity of adj insurmountable

2 senses of insurmountable

Sense 1
insurmountable (vs. surmountable), unsurmountable -- (not capable of being surmounted or overcome; "insurmountable disadvantages")
       => insuperable, unconquerable -- (incapable of being surmounted or excelled; "insuperable odds"; "insuperable heroes")
          Also See-> impossible#1; unconquerable#1

Sense 2
insuperable, insurmountable -- (impossible to surmount)
       => unconquerable (vs. conquerable) -- (not capable of being conquered or vanquished or overcome; "a tribute to his courage...and his unconquerable will"- R.E.Danielson; "faced unconquerable difficulties")