As adjectives the difference between unanswerable and unmentionable
is that unanswerable
is not answerable; impossible to answer while unmentionable
is not mentionable.
As a noun unanswerable
is something that cannot be answered.
* unaunswerable (qualifier)
Not answerable; impossible to answer.
Impossible to dispute or rebut; irrefutable; conclusive.
* (not answerable) answerless
* (impossible to dispute) indisputable
* (not answerable) answerable
* (impossible to dispute) disputable, refutable, inconclusive
Something that cannot be answered.