From King Dictionary of Contemporary Englishuntenableun‧ten‧a‧ble /ʌnˈtenəbəl/ adjective formal 1 an untenable situation has become so difficult that it is impossible to continue The scandal put the president in an untenable position.2 TRUE#an untenable argument, suggestion etc is impossible to defend
Examples from the Corpus
untenableBut by the time I came along, that seemed clearly untenable.It has been suggested that seasonal migrations could explain their presence, but this hypothesis is untenable.She has made my position here in Hochhauser untenable.They collectively dismissed the prospect as untenable.Today, however, such an assertion is wholly untenable.Government restrictions have put the business in an untenable position.It was a ghoulish and, I knew immediately, untenable situation.