unendurableEnglishOxford English Thesaurusunendurable adjective the heat of the stoves made the kitchen almost unendurable: intolerable, unbearable, unacceptable, insufferable, insupportable, not to be borne, more than flesh and blood can stand; oppressive, overwhelming, overpowering, impossible; informal too much. ▷antonyms endurable, bearable.unendurable Oxford Dictionary of English