tenable Antonyms

untenable bewildering absolutely impossible highly unlikely highly improbable hardly likely extremely difficult to believe extremely unlikely extremely doubtful extremely hard to believe extremely implausible extremely improbable extremely unbelievable hard to swallow highly doubtful highly implausible highly unbelievable impossible to believe unsustainable unjustifiable groundless illogical implausible impossible improbable indefensible inexplicable insupportable insupposable intenable irrational jejune unreasonable vincible against the law unexplainable more than one can bear