incapable of being overcome; insurmountable
WordReference Random House Learner's Dictionary of American English © 2025
in•su•per•a•ble /ɪnˈsupərəbəl/USA pronunciation
adj.
WordReference Random House Unabridged Dictionary of American English © 2025- that cannot be overcome:insuperable difficulties right at the beginning.
in•su•per•a•ble
(in so̅o̅′pər ə bəl),USA pronunciation adj.
in•su′per•a•bil′i•ty, in•su′per•a•ble•ness, n.
in•su′per•a•bly, adv.
- incapable of being passed over, overcome, or surmounted:an insuperable barrier.
- Latin insuperābilis. See in-3, superable
- Middle English 1300–50
in•su′per•a•bly, adv.
Collins Concise English Dictionary © HarperCollins Publishers::
'insuperable' also found in these entries (note: many are not synonyms or translations):