That cannot be justified or excused; inexcusable
Excessive; immoderate; exorbitant
In horse management an unsound horse is one suffering ill-health that affects its suitability for its intended work.
Contradicting or disregarding the principles of logic.
Find another word for untenable. In this page you can discover 6 synonyms, antonyms, idiomatic expressions, and related words for untenable, like: indefensible, unsupportable, unreasonable, unsound, flawed and illogical.