From Longman Dictionary of Contemporary Englishintractablein‧trac‧ta‧ble /ɪnˈtræktəbəl/ adjective formal 1 SOLVE/DEAL WITH A PROBLEMan intractable problem is very difficult to deal with or solve the seemingly intractable problem of human greed2 DETERMINEDhaving a strong will and difficult to control —intractability /ɪnˌtræktəˈbɪləti/ noun [uncountable]
Examples from the Corpus
intractable• intractable enemies• Even rich nations often have intractable poverty.• The disposal of toxic wastes is one of the most intractable problems facing industrialized societies. 