Insurmountable
Pronunciation : In`sur*mount"a*ble
Part of Speech : a.
Etymology : [Pref. in- not + surmountable: cf. F. insurmountable.]
Definition : Defn: Incapable of being passed over, surmounted, or overcome; insuperable; as, insurmountable difficulty or obstacle. Locke. Hope thinks nothing difficult; despair tells us that difficulty is insurmountable. I. Watts.
Syn. -- Insuperable; impassable; invincible.
Source : Webster's Unabridged Dictionary, 1913