untenable
Impossible to justify
Untenable describes a position that cannot be maintained or defended.
An untenable argument collapses under scrutiny.
An untenable situation cannot continue: The flooding made the basement apartment untenable.
The word often appears in debates and disputes: His claim that he hadn't seen the emails became untenable once the records surfaced.
Impossible to execute
- infeasibleNot capable of achievement
- unviableIncapable of succeeding
- impossibleIncapable of occurring
- unrealisticLacking basis in reality
impracticable · unfeasible · nonviable · futile · hopeless · doomed · quixotic · unachievable
Cannot be reasonably defended
- unwarrantedWithout adequate justification
- baselessLacking factual support
- groundlessLacking factual support
- unfoundedWithout factual support
unsupported · unsubstantiated · inexcusable · insupportable · unpardonable · unconscionable · unreasonable · unconvincing
Containing faulty reasoning
- unsoundWeak or flawed
- invalidWithout legal force
- flawedHaving faults or imperfections
- faultyHaving defects or errors
irrational · erroneous · inconsistent · contradictory · paradoxical · absurd · preposterous · spurious
unworkable
Impossible to execute
- infeasibleNot capable of achievement
- unviableIncapable of succeeding
- impossibleIncapable of occurring
unrealistic · impracticable · unfeasible · nonviable · futile · hopeless · doomed · quixotic · unachievable · unattainable
unjustifiable
Cannot be reasonably defended
- unwarrantedWithout adequate justification
- baselessLacking factual support
- groundlessLacking factual support
unfounded · unsupported · unsubstantiated · inexcusable · insupportable · unpardonable · unconscionable · unreasonable · unconvincing · illegitimate
fallacious
Containing faulty reasoning
faulty · irrational · erroneous · inconsistent · contradictory · paradoxical · absurd · preposterous · spurious · sophistic
unstable
Prone to sudden change
- shakyTrembling or unstable
- insecureLacking self-assurance
- vulnerableOpen to attack
fragile · tenuous · wobbly · rickety · perilous · hazardous · dangerous · exposed · threatened · compromised
- unacceptableunacceptable, inappropriate, improper, wrong, forbidden
- unreasonableirrational, absurd, illogical, senseless, ludicrous
untenablesustainable
Able to endure long-term
viable · tenable · maintainable · workable · stable