From Longman Dictionary of Contemporary Englishunendurableun‧en‧dur‧a‧ble /ˌʌnɪnˈdjʊərəbəl◂ $ -ˈdʊr-/ adjective formal STAND/BEAR#too unpleasant, painful etc to bear SYN unbearable The pain was unendurable.
Examples from the Corpus
unendurable• But if the torture is to be compounded by organised mass merrymaking, life will soon become unendurable.• His desire to live was unendurable.• If she did not, and survived the failure, her life here would be unendurable.• Only sensation survived: being deafened by the rooster, yet finding silence unendurable.• To go back to spending her days there was unendurable.• When they arrived in camp, the dust was unendurable.• Some suffering is, however, permanently painful, unendurable even, and is neither a transitional stage nor is remediable. 