insurmountable

• It involved mechanical complications that seemed to be insurmountable, and up to the time Edison invented his perforating machine no really good method was available. —  Edison, His Life and Inventions
• The objection appeared to me insurmountable, and I instantly assented to it. —  The Confessions of J. J. Rousseau, Entire
• It says: 'It is freely asserted that Flipper will never be allowed to graduate; that the prejudice of the regular army instructors against the colored race is insurmountable, and that they will drive away from the Academy by persecution of some petty sort any colored boy who may obtain admittance there. —  Henry Ossian Flipper, The Colored Cadet at West Point
• In another: 'Your prejudices are insurmountable, and your reason most womanly—you are degenerated to the last degree.' —  The Letters of Elizabeth Barrett Browning (1 of 2)
• We believe these challenges are not insurmountable, they are teething problems.

Roget's II: The New Thesaurus

Allen's Synonyms and Antonyms

Used in the Same Context