untenable[adjective]Synonyms: unsustainable, groundless, illogical, indefensible, insupportable, shaky, unsound, weak
[TahlilGaran] English Synonym Dictionary ▲
un‧ten‧a‧ble /ʌnˈtenəb
əl/
adjective formal1. an untenable situation has become so difficult that it is impossible to continue:
The scandal put the President in an untenable position.2. an untenable argument, suggestion etc is impossible to defend
[TahlilGaran] Dictionary of Contemporary English ▲