insuperable

[ in-soo-per-uh-buh l ]

/ ɪnˈsu pər ə bəl /

incapable of being passed over, overcome, or surmounted: an insuperable barrier.

Origin of insuperable

First recorded in 1300–50; Middle English word from Latin word insuperābilis. See in-³, superable

in·su·per·a·bil·i·ty, in·su·per·a·ble·ness, noun in·su·per·a·bly, adverb

Second, they broke down the wall between teen music and adult music, a wall that had been insuperable until then.

A Revolution, With Guitars: How The Beatles Changed Everything |Michael Tomasky |January 28, 2014 |DAILY BEAST
But he prefers women - and most certainly does not love the baron, for the insuperable reason that he loves nobody except himself.

David's Bookclub: Sodom and Gomorrah |David Frum |September 29, 2012 |DAILY BEAST
Not necessarily an insuperable or lethal problem, but a problem that must be overcome—and certainly not a plus.

Comrade Ryan's Plan Has 110% Approval! |David Frum |August 16, 2012 |DAILY BEAST
What had seemed an insuperable difficulty was thus in a moment accomplished.

The Devil's Garden |W. B. Maxwell

Our plan was to go south, and not to leave the meridian unless we were forced to do so by insuperable difficulties.

The South Pole, Volumes 1 and 2 |Roald Amundsen
It looks very bad, but no real climber with his strength unimpaired would pronounce it, without trial, insuperable.

Hours of Exercise in the Alps |John Tyndall
The possession of exalted mental powers is no insuperable objection to this conclusion.

The Descent of Man and Selection in Relation to Sex, Vol. I (1st edition) |Charles Darwin
He said experience had proved that there were no insuperable difficulties in the case.

Abridgment of the Debates of Congress, from 1789 to 1856, Vol. I (of 16) |Thomas Hart Benton

insuperable

/ (ɪnˈsuːpərəbəl, -prəbəl, -ˈsjuː-) /

incapable of being overcome; insurmountable

insuperability or insuperableness, noun insuperably, adverb