ɪnˈsuːpərəbəl 
British ɪnˈsjuːpərəbəl
formal, of a problem, difficulty, etc.
: impossible to solve or get control of : impossible to overcome
They succeeded despite some nearly insuperable [=insurmountable] difficulties.
insuperable barriers
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“Insuperable.” Merriam-Webster.com Simple Definition, Merriam-Webster, https://www.merriam-webster.com/simple/insuperable. Accessed 21 Jun. 2026.
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