a. [ Pref. in- not + surmountable: cf. F. insurmountable. ] Incapable of being passed over, surmounted, or overcome; insuperable;
Hope thinks nothing difficult; despair tells us that difficulty is insurmountable. I. Watts.
n. The state or quality of being insurmountable; insurmountability. [ 1913 Webster ]
a. [ Cf. F. surmontable. ] Capable of being surmounted or overcome; superable. --
a. Insurmountable. Locke. [ 1913 Webster ]