INSURMOUNTABLE
insuperable, insurmountable
(adjective) impossible to surmount
insurmountable, unsurmountable
(adjective) not capable of being surmounted or overcome; “insurmountable disadvantages”
Source: WordNet® 3.1
Etymology
Adjective
insurmountable (comparative more insurmountable, superlative most insurmountable)
Incapable of being passed over, surmounted, or overcome; insuperable
Antonyms
• surmountable
Source: Wiktionary
In`sur*mount"a*ble, a. Etym: [Pref. in- not + surmountable: cf. F.
insurmountable.]
Definition: 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 Edition