From Longman Dictionary of Contemporary Englishinsupportablein‧sup‧port‧a‧ble /ˌɪnsəˈpɔːtəbəl $ -ˈpɔːr-/ adjective formal UNPLEASANTextremely bad or annoying SYN unbearable insupportable pain Her behaviour was insupportable.
Examples from the Corpus
insupportable• Staffing levels are currently insupportable. 